# 99 is 5 percent of what number?

## 1980

## (99 is 5 percent of 1980)

### 99 is 5 percent of 1980. 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 "99 is 5 percent of what number" with step by step explanation:

#### Method 1: Diagonal multiplication to calculate "99 is 5 percent of what number".

- As given: For 5, our answer will be 100
- Assume: For 99, our answer will be X
- 5*X = 100*99 (In Steps 1 and 2 see colored text; Diagonal multiplications will always be equal)
- X = 100*99/5 = 9900/5 = 1980

#### 99 is 5 percent of 1980

#### Method 2: Same side division to calculate "99 is 5 percent of what number".

- As given: For 5, our answer will be 100
- Assume: For 99, our answer will be X
- 100/x = 5/99 (In Step 1 and 2, see colored text; Same side divisions will always be equal)
- 100/X = 5/99 or x/100 = 99/5
- X = 99*100/99 = 9900/5 = 1980

#### 99 is 5 percent of 1980

### 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. 99% (read as 99 percent) can also be expressed as 99/100 or 99:100.Example: If 99% (99 percent) of your savings are invested in stocks, then 99 out of every 100 dollars are invested in stocks. If your savings are $10,000, then a total of 99*100 (i.e. $9900) are invested in stocks.

### Calculate percentages in your head

At times you need to calculate a tip in a restaurant, or how to split money between friends in your head, that is without any calculator or pen and paper.Many a time, it is quite easy if you break it down to smaller chunks. You should know how to find 1%, 10% and 50%. After that finding percentages becomes pretty easy.

- To find 5%, find 10% and divide it by two
- To find 11%, find 10%, then find 1%, then add both values
- To find 15%, find 10%, then add 5%
- To find 20%, find 10% and double it
- To find 25%, find 50% and then halve it
- To find 26%, find 25% as above, then find 1%, and then add these two values
- To find 60%, find 50% and add 10%
- To find 75%, find 50% and add 25%
- To find 95%, find 5% and then deduct it from the number

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