Percent Less Than

The calculator finds by what percent one number is less than another. It uses the following formula:

$100\%-\frac{A}{B}·100\%$
where A is the smaller number and B is the larger number.

According to the formula, to find by what percent one number is less than another, subtract the ratio of the smaller number to the larger one, multiplied by 100%, from 100%.

The calculator quickly and accurately finds the percentage ratio of two numbers and shows the result with all intermediate steps. It is useful both in everyday life and in exact math calculations.

Example:
Find by what percent 5 is less than 20.
$100\%-\frac{5}{20}·100\%=100\%-25\%=75\%$
Answer: 5 is less than 20 by 75%

Example:
A well produced 150 thousand m³ in the first half of the year and 141 thousand m³ in the second half. By what percent did the output decrease?
$100\%-\frac{141}{150}·100\%=100\%-94\%=6\%$
Answer: the well output decreased by 6%.