Percent Word Problems

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 does it mean if 75% of a class passed a test?

Back

It means that 75 out of every 100 students in the class passed the test.

Front

If 15 students represent 75% of the class, how do you find the total number of students?

Back

Divide the number of students who passed (15) by the percentage in decimal form (0.75). Total students = 15 / 0.75 = 20.

Front

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

Back

Total = Part / (Percentage in decimal form).

Front

If a zoo has 20 exhibits and 55% are reptiles, how do you find the number of reptile exhibits?

Back

Multiply the total number of exhibits (20) by the percentage of reptile exhibits (0.55). Number of reptile exhibits = 20 * 0.55 = 11.

Front

How do you find 30% of a weight?

Back

Multiply the weight by 0.30. For example, for a 40-pound bar, 30% of it is 40 * 0.30 = 12 pounds.

Front

What does it mean if 24 painters make up 75% of the crew?

Back

It means that 24 is 75% of the total number of painters, and you can find the total by dividing 24 by 0.75.

Front

If a used van costs $30,000 and a new van costs $50,000, how do you find the percentage of the new van's price that the used van costs?

Back

Divide the price of the used van by the price of the new van and multiply by 100. Percentage = (30,000 / 50,000) * 100 = 60%.

Front

What is the relationship between part, whole, and percentage?

Back

The part is the portion of the whole, and the percentage expresses how much of the whole the part represents.