Percent of a Number
Percent · Class V
What is p% of n?
25 %
type a value
0100
200
type a value
01000
Live values
- p% as decimal0.25
- Result50
- Percent line
Formulas in this lab
- p% as decimal
- Result
Tip: Percent means 'out of 100' , divide by 100 and multiply!
Frequently asked questions
▶What does percent mean?
Percent means out of 100. So 25 percent is 25 out of 100, which is the same as 1/4 or 0.25. To find a percent of a number, multiply the number by the percent and divide by 100.
▶How do I use the percent lab?
Pick a percent and a number with two sliders. The lab works out the answer step by step. For 20 percent of 50, it shows 20 times 50 divided by 100, which is 10.
▶When do we see percents?
Shops offer 10 percent off on Diwali. You score 85 percent in your test. GST on food in a hotel may be 5 percent. Percents are everywhere in bills and exams.
▶Quick percent tricks
10 percent is just dividing by 10. So 10 percent of 250 is 25. 50 percent is half. To find 20 percent, double 10 percent. These shortcuts make mental maths much faster.