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Percentage Calculator

Calculate a percent of a value before and after,
or find the percentage change between two values,
and see how to calculate each one.

Explore Percentages

Use the calculator to explore percentages. Here are some ideas

  • Apply 10% to 100, and see how each value was calculated
  • Try 12.5% of 50: the "50 less 12.5%" value is 43.75.
  • Then try 12.5% of 43.75 (shows that after a 12.5% reduction it was 50.)
  • Compare 100 to 110, and see that to go from 100 to 110 is a 10% increase, but to go from 110 back down to 100 is a 9.09% decrease (not a 10% decrease)