Percent Proportions Review

Front

What is a percent proportion?

Back

A percent proportion is a way to express a part of a whole as a fraction of 100. It is often used to find percentages in real-life situations.

Front

How do you calculate the total cost after tax?

Back

To calculate the total cost after tax, multiply the original price by the tax rate (as a decimal) and then add that amount to the original price.

Front

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

Back

The formula to find a percentage of a number is: (Percentage/100) x Total Number.

Front

If 22% of students do not like Dr. Pepper, how do you find the percentage that do?

Back

To find the percentage that do like Dr. Pepper, subtract the percentage that do not from 100%. So, 100% - 22% = 78%.

Front

What is 10% of $80?

Back

10% of $80 is $8.

Front

How do you convert a fraction to a percentage?

Back

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

Front

What is the percentage of people who do not buy lunch if 8 out of 10 do?

Back

If 8 out of 10 people buy lunch, then 2 out of 10 do not. To find the percentage, (2/10) x 100 = 20%.

Front

What is 12.5% of 50?

Back

12.5% of 50 is 6.25.

Front

How do you find the number of students who like Dr. Pepper if 150 students were asked?

Back

If 22% do not like Dr. Pepper, then 78% do. To find the number, calculate 78% of 150: (78/100) x 150 = 117.

Front

What does it mean if a tax is 10%?

Back

A tax of 10% means that for every dollar spent, an additional 10 cents is added as tax.