Percent Proportion

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is denoted by the symbol '%'. For example, 50% means 50 out of 100.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 20% of 50, calculate 50 x 0.20 = 10.

Front

What is the formula for finding the percent of a part compared to a whole?

Back

The formula is: (Part/Whole) x 100 = Percent. For example, if you have 25 out of 200, the percent is (25/200) x 100 = 12.5%.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the top number (numerator) by the bottom number (denominator) and then multiply by 100. For example, 1/4 = (1 ÷ 4) x 100 = 25%.

Front

What is the relationship between percent, fraction, and decimal?

Back

Percent, fraction, and decimal are different ways to represent the same value. For example, 50% = 0.50 = 1/2.

Front

If a shirt costs $40 and is on sale for 25% off, how much do you save?

Back

You save $10. (25% of $40 = 0.25 x 40 = $10).

Front

What is the original price if you save $12 by using a 20% off coupon?

Back

The original price is $60. (If $12 is 20%, then $12 ÷ 0.20 = $60).

Front

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

Back

Divide the first number by the second number and multiply by 100. For example, to find what percent 30 is of 150, calculate (30 ÷ 150) x 100 = 20%.

Front

What is 15% of 200?

Back

15% of 200 is 30. (200 x 0.15 = 30).

Front

If a student answered 18 out of 24 questions correctly, what percent did they get right?

Back

The student got 75% right. (18 ÷ 24) x 100 = 75%.