Mental Math Percents

Front

What is 50% of 84?

Back

42 (half of 84)

Front

What is 5% of 68?

Back

3.4 (Find 10% of 68, which is 6.8, then cut in half)

Front

What is 60% of 40?

Back

24 (Find 50% of 40, which is 20, and 10% of 40, which is 4, then add them: 20 + 4 = 24)

Front

What is 110% of 80?

Back

88 (Find 100% of 80, which is 80, and 10% of 80, which is 8, then add them: 80 + 8 = 88)

Front

What is 10% of 75?

Back

7.5 (10% of 75 is calculated by dividing 75 by 10)

Front

Define percent.

Back

A percent is a ratio expressed as a fraction of 100.

Front

How do you find 10% of a number?

Back

Divide the number by 10.

Front

What is the formula to find a percentage of a number?

Back

Percentage of a number = (Percentage / 100) * Number.

Front

What is 25% of 200?

Back

50 (25% is a quarter, so 200 divided by 4 is 50)

Front

How do you find 1% of a number?

Back

Divide the number by 100.