Part, Whole, Percent Practice

Front

What is a part-to-whole relationship?

Back

A part-to-whole relationship shows how a part compares to the total or whole. For example, if 3 out of 10 students are wearing glasses, the part is 3 and the whole is 10.

Front

How do you calculate the percentage of a part?

Back

To calculate the percentage of a part, divide the part by the whole and then multiply by 100. For example, if 5 out of 20 apples are red, the percentage is (5/20) * 100 = 25%.

Front

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

Back

The formula is: Whole = Part / (Percentage / 100). For example, if 30 is 60% of a whole, the whole is 30 / (60/100) = 50.

Front

If 25% of a number is 20, what is the number?

Back

To find the number, use the formula: Number = Part / (Percentage / 100). Here, Number = 20 / (25/100) = 80.

Front

What does it mean if 60% of a class passed a test?

Back

It means that out of the total number of students in the class, 60% successfully completed the test.

Front

How do you find 10% of a number?

Back

To find 10% of a number, divide the number by 10. For example, 10% of 50 is 50 / 10 = 5.

Front

What is the relationship between fractions and percentages?

Back

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

Front

If a store sold 40% of its items, how do you find the total number of items sold?

Back

If you know the number of items sold, use the formula: Total Items = Sold Items / (Percentage / 100). For example, if 80 items were sold, Total Items = 80 / (40/100) = 200.

Front

What is the percentage of students who did not pass if 75% passed?

Back

If 75% passed, then 100% - 75% = 25% did not pass.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide by 100. For example, 45% as a decimal is 45 / 100 = 0.45.