# 21 increased by 90 percent

Here you will see step by step solution to calculate 21 increased by 90 percent. What is 21 increased by 90%? It is 39.9, and the increase is 18.9. Check the detailed explanation of answer given below.

## Answer: 21 increased by 90% is

= 39.9

### How to increase the number 21 by 90 percent?

With the help of given formula we can get the the percent increase value -

formula 1: Percentage increase = P% × n, P = Percent, n = Number

formula 2: Result = n + Percentage increase
Here we have, n = 21, P = 90%

#### Solution for 21 increased by 90 percent(90%) -

Given number n = 21, P = 90%

• Put the n and P values in the given formula:
• => 90% × 21
=> 90/100 × 21

• Now we need to simplify the fraction by multiply 90 with 21, then divide it by 100
• => 90 × 21/100 = 1890/100 = 18.9
• Percentage Increase = 18.9
• Now we will use formula 2 to get the value of 21 increased by 90%
• = 21 + 18.9
= 39.9

Therefore, result is for 21 increased by 90% is 39.9 and increase is 18.9.

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