Percent Proportions

Front

What is a percent proportion?

Back

A percent proportion is a way to express a part of a whole as a percentage. It is often used to compare a part to the total.

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 does it mean if something is '19% off'?

Back

If something is '19% off', it means that the price is reduced by 19% of its original price.

Front

How do you find the original price if you know the discount and the sale price?

Back

To find the original price, divide the amount saved by the discount rate (in decimal form). For example, if you saved $40 with a 19% discount, the original price is $40 / 0.19 = $210.53.

Front

What is 60% of 11,000?

Back

6,600

Front

What is 40% of 230?

Back

92

Front

What is 23% of 65?

Back

14.95

Front

How do you calculate a tip based on a percentage?

Back

To calculate a tip, multiply the total bill by the tip percentage (in decimal form). For example, for a $10 bill with a 15% tip, calculate 10 x 0.15 = $1.50.

Front

If a leaf-blower is $200 and is 19% off, how much do you save?

Back

You save $38 (200 x 0.19 = 38).

Front

What is the formula to find the percentage of a part compared to a whole?

Back

The formula is (part/whole) x 100 = percentage.