# 80 percent of twenty one Dollars

Using this tool you can find any percentage in three ways. So, we think you reached us looking for answers like: What is 80 (80%) percent (%) of twenty one (21)? Or may be: 80 percent of twenty one Dollars. See the solutions to these problems just after the percentage calculator below.

See the solutions to these problems just after the percentage calculator below.

## How to work out percentages - Step by Step

Here are the solutions to the questions stated above:

### 1) What is 80% of 21?

Always use this formula to find a percentage:

^{%} / _{100} = ^{Part} / _{Whole} replace the given values:

^{80} / _{100} = ^{Part} / _{21}

Cross multiply:

80 x 21 = 100 x Part, or

1680 = 100 x Part

Now, divide by 100 and get the answer:

Part = ^{1680} / _{100} = 16.8

### 2) 80 is what percent of 21?

Use again the same percentage formula:

^{%} / _{100} = ^{Part} / _{Whole} replace the given values:

^{%} / _{100} = ^{80} / _{21}

Cross multiply:

% x 21 = 80 x 100

Divide by 21 and get the percentage:

% = ^{80 x 100} / _{21} = 380.95238095238%