# How do you do simple percentages?

## How do you do simple percentages?

1. How to calculate percentage of a number. Use the percentage formula: P% * X = Y

- Convert the problem to an equation using the percentage formula: P% * X = Y.
- P is 10%, X is 150, so the equation is 10% * 150 = Y.
- Convert 10% to a decimal by removing the percent sign and dividing by 100: 10/100 = 0.10.

## How do you find 15% of a number?

15% is 10% + 5% (or 0.15 = 0.1 + 0.05, dividing each percent by 100). Thinking about it this way is useful for two reasons. First, it’s easy to multiply any number by 0.1; just move the decimal point left one digit. For example, 75.00 x 0.1 = 7.50, or 346.43 x 0.1 = 34.64 (close enough).

## How do you find 70 percent of a number?

Example 1. Find 70% of 80. Following the shortcut, we write this as 0.7 × 80. Remember that in decimal multiplication, you multiply as if there were no decimal points, and the answer will have as many “decimal digits” to the right of the decimal point as the total number of decimal digits of all of the factors.

## What number is 40% of 80?

32

## How do you write 100 percent in a paper?

3 Answers. The statistical-sounding expression is no problem, but if you want to be formal in register, as your headline indicates, you should probably spell it out as “one hundred percent”—and also spell out “it is” (which latter you have here contracted).

## How do you find percentages without a calculator?

If you need to find a percentage of a number, here’s what you do – for example, to find 35% of 240: Divide the number by 10 to find 10%. In this case, 10% is 24. Multiply this number by how many tens are in the percentage you’re looking for – in this case, that’s 3, so you work out 30% to be 24 x 3 = 72.

## How do you write a percentage in a paper?

Use the word “percent” after any number that begins a sentence, title or text heading. The APA rule for numbers is that you should begin a sentence with a word even if the number is greater than nine, and the word “percent” should also be used. For example: Forty-eight percent of the sample showed an increase. 4.

## What is a 40% discount on $80?

Percent Off Table For 80.00

1 percent off 80.00 is 79.20 | The difference is 0.80 |
---|---|

38 percent off 80.00 is 49.60 | The difference is 30.40 |

39 percent off 80.00 is 48.80 | The difference is 31.20 |

40 percent off 80.00 is 48.00 | The difference is 32.00 |

41 percent off 80.00 is 47.20 | The difference is 32.80 |