Percent Pop
Four bubbles fall at once. Click the one that answers the question. Wrong pops and misses cost a life.
score 0
How to play Percent Pop
Each round shows a question such as 15% of 80 and drops four numbered bubbles. Click the bubble with the correct answer before the bubbles reach the floor. A correct pop scores a point and speeds the next round up. A wrong pop or a miss costs one of your three lives.
The math behind it
To find a percentage of a number, divide the percent by 100 and multiply. 15% of 80 is 0.15 × 80 = 12. A faster mental route is to start from 10%: move the decimal one place (8), take half of that for 5% (4), and add them (12).
Other anchors help too: 50% is half, 25% is a quarter, 75% is three quarters, and 20% is one fifth. If you can build any percent from 10%, 5% and 1%, you can answer these questions in a second or two.
Why practice percentages
Percentages are behind discounts, sales tax, tips, interest rates and tax brackets. Being quick at them makes it easy to sanity-check a price or a loan offer. When you want exact figures, use the percentage calculator, and the discount and tip calculators for shopping and dining.
Frequently asked questions
How do I calculate a percentage in my head?
Find 10% by moving the decimal one place, then add or halve it. For 15% of 80: 10% is 8, 5% is 4, so the answer is 12.
What is the fastest way to find 25% of a number?
Divide by 4. A quarter of 80 is 20, so 25% of 80 is 20.
Does the game get harder?
Yes. The bubbles fall faster with every correct answer, so your reaction time matters as much as the math.
Is Percent Pop free?
Yes. It runs in your browser with no sign-up and nothing is stored.
Related calculators
- Percentage Calculator: Percentage calculator: find X% of any number, or what percent one number is of another.
- Discount Calculator: Discount calculator: final sale price and savings after a percent-off discount, with optional sales tax.
- Tip Calculator: Tip calculator: work out the tip and split the bill per person at 15%, 18%, 20% or any custom percentage.
More math games
- Sale Catcher: Steer the basket across three lanes and catch only the real bargains.
- Tip Jar: Drop coins into the jar to make exactly the right tip.
- Balance Beam: Drag the weight along the seesaw until it levels. Center of mass, as a game.
- Gas Piston: Heat the gas, then drag the piston to where it settles. The gas laws in play.
- Loan Gauge: Choose the loan term that puts the payment needle in the green.
- Thermo Tune: Drag the mercury to the Celsius reading that matches the Fahrenheit shown.