Percent Word Problem Review

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is denoted by the symbol '%'.

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 * 0.20 = 10.

Front

What is the formula to find what percent one number is of another?

Back

The formula is: (Part/Whole) * 100 = Percent. For example, to find what percent 30 is of 40, use (30/40) * 100 = 75%.

Front

How do you find the total amount after adding a percentage?

Back

To find the total amount after adding a percentage, calculate the percentage of the original amount and then add it to the original amount. For example, for a $70 bill with a 20% tip: 70 * 0.20 = 14, so total = 70 + 14 = $84.

Front

What is 45% of 50?

Back

22.5

Front

If Shirley spelled 12 out of 15 words correctly, what percent did she get?

Back

80% (calculated as (12/15) * 100).

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) * 100 = 25%.

Front

What is 75% of 40?

Back

30

Front

If Ella has 40 CDs and 75% are rock music, how many rock CDs does she have?

Back

30 (calculated as 40 * 0.75).

Front

What does it mean to give a tip as a percentage?

Back

Giving a tip as a percentage means calculating a portion of the total bill based on a percentage rate. For example, a 20% tip on a $70 bill is $14.