Percent Word Problems

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 20% of 360, calculate 360 * 0.20 = 72.

If a score is 140% higher, it means it is 140% more than the other score. To find the original score, divide the higher score by 2.4 (1 + 1.4).

To find the sale price, subtract the discount amount from the original price. The discount amount is calculated by multiplying the original price by the discount percentage.

Sales Tax = Purchase Price x Sales Tax Rate. To find the total cost, add the sales tax to the purchase price.

Multiply the total number of people by 0.60. For example, if there are 35 people, then 35 * 0.60 = 21 people completed the task.

In percentage problems, the part is the portion of the whole that is being considered, and the whole is the total amount.

To convert a fraction to a percentage, divide the numerator by the denominator and then multiply by 100. For example, 1/4 = 0.25 x 100 = 25%.

To find a percentage increase, subtract the original value from the new value, divide by the original value, and multiply by 100.

To find the original price, divide the sale price by (1 - discount rate). For example, if the sale price is $26 and the discount is 35%, the original price is $26 / 0.65 = $40.