Spike's Calculators

Calculate the percent of a percent. The easiest way of doing this is by converting the percent values to decimals and then multiplying the two values by each other, and multiply this result by 100 to get the percent of a percent value.

##### Example:

What is 25% of 30% 25% ÷ 100 = 0.25 30% ÷ 100 = 0.3 0.25 * 0.3 = 0.075 * 100 = 7.5% 25% of 30% = 7.5% 25% of 30% is the same as 30% of 25%

- enter a value for the first percentage
- enter a value for the second percentage
- the number of digits you want in your result

- the percent value of a percent of a percent

- Compound Interest
- Discount in Percentages
- Elevation from Slope Percentage
- Fraction to Decimal and Percent
- Number of a Number Percentage
- Number to Percent
- Percent of a Percent
- Percent to Fraction
- Percentage Amount to a 100% Amount
- Percentage Amount from a Starting Amount
- Slope of a Driveway in a Percentage
- Surcharge in Percentages