# 21 is 5 percent of what number?

## 420

## (21 is 5 percent of 420)

### 21 is 5 percent of 420. Explanation: What does 5 percent or 5% mean?

Percent (%) is an abbreviation for the Latin “per centum”, which means per hundred or for every hundred. So, 5% means 5 out of every 100.

### Methods to calculate "21 is 5 percent of what number" with step by step explanation:

#### Method 1: Diagonal multiplication to calculate "21 is 5 percent of what number".

- As given: For 5, our answer will be 100
- Assume: For 21, our answer will be X
- 5*X = 100*21 (In Steps 1 and 2 see colored text; Diagonal multiplications will always be equal)
- X = 100*21/5 = 2100/5 = 420

#### 21 is 5 percent of 420

#### Method 2: Same side division to calculate "21 is 5 percent of what number".

- As given: For 5, our answer will be 100
- Assume: For 21, our answer will be X
- 100/x = 5/21 (In Step 1 and 2, see colored text; Same side divisions will always be equal)
- 100/X = 5/21 or x/100 = 21/5
- X = 21*100/21 = 2100/5 = 420

#### 21 is 5 percent of 420

### Percentage examples

Percentages express a proportionate part of a total. When a total is not given then it is assumed to be 100. E.g. 21% (read as 21 percent) can also be expressed as 21/100 or 21:100.Example: If 21% (21 percent) of your savings are invested in stocks, then 21 out of every 100 dollars are invested in stocks. If your savings are $10,000, then a total of 21*100 (i.e. $2100) are invested in stocks.

### Percentage sign (%)

The percent (per cent i.e. per hundred) sign % is the standard symbol to indicate a percentage, to signify a number or ratio as a fraction of 100. Related signs include the permille (per thousand) sign ‰ and the permyriad (per ten thousand) sign ‱ (also known as a basis point), which indicate that a number is divided by one thousand or ten thousand, respectively.### Scholarship programs to learn math

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