241210 Percents & Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply and then divide to find the unknown value.

Front

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

Back

The formula is: Percent = (Part/Whole) x 100.

Front

How do you find what percent one number is of another?

Back

Divide the part by the whole and multiply by 100.

Front

What is the relationship between decimals and percents?

Back

A decimal can be converted to a percent by multiplying by 100. For example, 0.34 = 34%.

Front

How do you express a ratio as a percent?

Back

To express a ratio as a percent, divide the first number by the second number and multiply by 100.

Front

What is 20% of 150?

Back

20% of 150 is 30.

Front

If 80 is what percent of 50?

Back

80 is 160% of 50.