Multiply the two percentages as decimals
Formula: `=A1*B1`
If A1 contains 20% and B1 contains 30%, the result is 6%
To find 20% of 30%, use `=20%*30%`
To calculate a percentage of a percentage from values entered as numbers, divide by 100 first
Formula: `=(A1/100)*(B1/100)`
Format the result cell as Percentage if needed
To get the final percent from a base value and a percent increase, use `=Base*(1+Percent)`
To get the final percent from a base value and a percent decrease, use `=Base*(1-Percent)`