Percent Proportion Word Problems 2020 AMPS

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 find a percentage of a number?

Back

To find a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 15% of 60, calculate 60 * 0.15 = 9.

Front

What is the formula to find the total when given a part and a percentage?

Back

The formula is: Total = Part / (Percentage in decimal form). For example, if 15 is 75% of a number, the total is 15 / 0.75 = 20.

Front

If 25% of a number is 40, what is the number?

Back

The number is 160, calculated as 40 / 0.25.

Front

What does it mean if 40% of a group is a certain number?

Back

It means that the certain number represents 40 out of every 100 parts of the group.

Front

How do you calculate the percentage of items that are not a certain type?

Back

To find the percentage of items that are not a certain type, subtract the percentage of that type from 100%. For example, if 12% are country songs, then 100% - 12% = 88% are not country songs.

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by multiplying by 100. For example, 1/4 = 0.25 = 25%.

Front

How do you express a percentage as a decimal?

Back

To express a percentage as a decimal, divide by 100. For example, 25% = 25/100 = 0.25.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if 15 out of 60 dogs are puppies, the proportion is 15/60.

Front

How do you solve a percent proportion problem?

Back

Set up a proportion where the part over the whole equals the percentage over 100, then cross-multiply and solve for the unknown.