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Students & teachersTest strategy, math concepts broken down to their bones, and the stuff nobody thinks to tell you before a big exam. Use it. Share it. It's free.
Pick any table or drill all of them. Flip mode or type-your-answer mode. Misses get recycled back into the deck until you get every one right.
Start drilling →The word tells you everything. Per means divided by. Cent means 100. One equation handles every percent problem on every test.
Test strategyYour brain is an organ. It runs on fuel and rest. Most people tank their test score the night before without knowing it.
Test strategyHow you study and how you take a test should be completely different. Mixing them up is one of the most common ways prepared students underperform.
Before you solve for x, you have to read the problem well enough to know what x actually is.
It's a strategy decision, not a default. Here's how to pick the right one for your situation.
Never let one hard question eat five easy ones. Here's the exact method.
Math concept
The word is not just a label. It's a definition. And once you see it, you can't unsee it.
In math, per means divided by. Miles per hour — miles divided by hours. Feet per second — feet divided by seconds. Inches per foot — inches divided by feet. Per is always division.
Cent means one hundred. Cents in a dollar. Years in a century. Centimeters — hundredths of a meter. Always 100.
Put them together: percent means divided by 100. That's it. That's the whole concept. The word is telling you exactly what to do with the number.
And look at the symbol — %. It's the parts of 100 rearranged to look like a fraction. A 1 on top, two zeros on the sides. The symbol is showing you the operation.
Why do we love dividing by 100? Two reasons. We use the decimal system — everything grows by tens. And 100 is the sweet spot for comparisons: 10 gives too little variation, 1000 gets away from where our intuition is comfortable. With 100 we can break a whole into categories that feel natural — 10% of this, 30% of that, 45% of the other thing, 15% left over.
That's the concept. Now here's the method — one equation that handles every percent problem on every test, no matter how they word it.
Every percent problem gives you two of those three pieces — part, whole, or percent — and asks you to find the third. Your job is to read the problem carefully enough to know which piece is missing, plug the other two in, and cross-multiply to solve.
This is where the reading comes in. The math itself is one step of algebra. The hard part is extracting the right numbers from the word problem and knowing which slot each one goes in. That skill — reading to find the pieces — is what separates students who get percent problems right from students who get them wrong, and it has nothing to do with math ability.
Tactical tip: When you see a percent problem, before you touch the math — underline the whole, circle the part, and box the percent. If one of those three is missing, that's your answer. Then set up the equation and solve. Every time.
Test strategy
Your brain is an organ. It runs on fuel and rest. Most people tank their test score the night before without knowing it.
You spent weeks preparing. The material is in your head. On test day, your only job is to access it. Everything that gets in the way of that access is a problem you can prevent — and most of it happens the night before.
Sleep is not optional. A tired brain does not retrieve information well. It second-guesses answers it knows. It loses focus mid-problem. It makes arithmetic errors on problems it could solve in its sleep — literally. The single highest-return thing you can do the night before a test is go to bed on time. Not study more. Sleep.
Eat before you go. Not a huge meal — a full stomach pulls blood flow away from your brain toward your gut. But an empty stomach is worse. Something with protein and complex carbs an hour or two before the test. Your brain runs on glucose. Give it fuel at a steady rate, not a spike.
Do not cram the morning of. If you don't know it by the morning of the test, trying to learn it in two hours is not going to work and it will rattle your confidence on what you do know. The morning of is for eating, arriving early, and being calm. That's it.
The night before checklist: Know where you're going. Know what time to leave. Pack what you need. Eat a real dinner. Stop studying by 9pm. Sleep.
Arrive early. Walking in with two minutes to spare puts your nervous system in fight-or-flight before you answer a single question. Arriving 20 minutes early lets your body settle. You get to look around, breathe, and start from a calm baseline instead of a stressed one.
None of this is complicated. But most people treat test preparation as purely about the content and completely ignore the physical and logistical side. That's points left on the table for no reason.
Test strategy
How you study and how you take a test should be completely different. Confusing them costs points.
When you're practicing, your goal is to learn. That means slowing down on hard problems, figuring out why you got something wrong, going back and looking things up, asking questions. Struggle is the point. The discomfort of not knowing yet is where the learning happens. Practice mode is slow, analytical, and self-correcting.
When you're taking a test, your goal is to demonstrate what you already know — as efficiently as possible. That means moving at a pace, making your best call on hard questions, and not burning five minutes on one problem when four other questions are waiting. Performance mode is decisive, forward-moving, and time-aware.
The mistake most students make: they bring practice mode habits into the test. They stall on a hard question trying to figure it out from scratch. They second-guess answers they knew were right. They run out of time not because they didn't know the material but because they didn't manage their pace.
The 90-second rule: If you've been on a question for 90 seconds and you're not close, mark it and move on. Answer everything you know first. Come back to the hard ones with whatever time remains. A question you skip is zero points. A question you answer — even with a reasonable guess — has a chance. Never let one hard question eat four easy ones.
The other piece: don't change answers unless you have a specific reason. Your first instinct on a multiple choice question is usually right. Students who go back and change answers "just because" get them wrong more often than they get them right. Change an answer only if you re-read the question and found a clear reason your first answer was wrong — not because you feel nervous about it.
Practice like you're learning. Test like you're performing. Keep those two modes separate in your head and in your habits, and your test scores will reflect what you actually know.
The mindset shift: On test day you are not a student trying to figure things out. You are a performer executing what you've already prepared. Those are different jobs. Show up to the right one.
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