# What is 40 percent of 31?

## 12.4

## (40 percent of 31 is 12.4)

### 40 percent of 31 is 12.4. Explanation: What does 40 percent or 40% mean?

Percent (%) is an abbreviation for the Latin “per centum”, which means per hundred or for every hundred. So, 40% means 40 out of every 100.

### Methods to calculate "What is 40 percent of 31" with step by step explanation:

#### Method 1: Diagonal multiplication to calculate 40 percent of 31.

- For 100, our answer will be 40
- For 31, our answer will be x
- 100*x = 40*31 (In Step 1 and 2 see colored text; Diagonal multiplications will always be equal)
- x = 40*31/100 = 1240/100 = 12.4

#### Answer: 40 percent of 31 is 12.4

#### Method 2: Same side division to calculate 40 percent of 31

- For 100, our answer will be 40
- For 31, our answer will be x
- 100/31 = 40/x (In Step 1 and 2, see colored text; Same side divisions will always be equal)
- 40/x = 100/31 or x/40 = 31/100
- x = 31*40/100 = 1240/100 = 12.4

#### Answer: 40 percent of 31 is 12.4

#### Method 3: Converting Percentage to Decimal to calculate 40 percent of 31

- Find the decimal equivalent of 40 i.e. 40/100 = 0.4
- Multiply the decimal equivalent (above) to the given number i.e. 31*0.4 = 12.4

#### Answer: 40 percent of 31 is 12.4

### 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. 40% (read as 40 percent) can also be expressed as 40/100 or 40:100.Example: If 40% (40 percent) of your savings are invested in stocks, then 40 out of every 100 dollars are invested in stocks. If your savings are $10,000, then a total of 40*100 (i.e. $4000) 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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