What number is 12?

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

To do 15 of a number, you would multiply the number by 5 and then add 1. So if you wanted to do 15 of a number, you would multiply it by 5 and then add 1 to get 10. Then, you would subtract that number from the original number in order to get your answer. For example, if the original number was 3, you would subtract 3 from 10 to get 7.

### How do you find 15 percent of a number on a calculator?

To find 15 percent of a number on a calculator, you would enter the percentage in the decimal form and then move the decimal point two places to the left. For example, if you wanted to find out what 15% of $1.00 is, you would enter 0.15 and then move the decimal point two places to the left to get 0.0015.

### How do you add 15 to a number?

To add 15 to a number, you would multiply the number by 2 and then add 5. For example, if you wanted to add 30 to a number, you would multiply it by 2 and then add 10.