Mental Math Percents

Front

What is 10% of a number?

Back

To find 10% of a number, divide the number by 10.

Front

What is 100% of a number?

Back

100% of a number is the number itself.

Front

How do you find 110% of a number?

Back

To find 110% of a number, first find 100% (the number itself) and then add 10% of that number.

Front

What is 5% of a number?

Back

To find 5% of a number, first find 10% of the number and then divide it by 2.

Front

Find 10% of 325.

Back

32.5

Front

Find 110% of 80.

Back

88

Front

Find 110% of 64.

Back

70.4

Front

Find 10% of 16.

Back

1.6

Front

Find 5% of 68.

Back

3.4

Front

What is the formula to calculate percentage?

Back

Percentage = (Part/Whole) x 100.