Unit 8 Test Review

Front

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

Back

To find a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 35% of 175, calculate 175 * 0.35.

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. For example, 3/4 = (3 ÷ 4) * 100 = 75%.

Front

What is 35% of 175?

Back

61.25

Front

How do you find a fraction of a group?

Back

To find a fraction of a group, multiply the total number of items by the fraction. For example, for 3/4 of 20 students, calculate 20 * (3/4) = 15 students.

Front

If 1/3 of a group has a certain characteristic, how do you find the number of individuals with that characteristic?

Back

Multiply the total number of individuals by 1/3. For example, if 15 students own a cell phone, then 1/3 of them with a game app is 15 * (1/3) = 5 students.

Front

What is a reasonable estimate for 7% of 78?

Back

5.6

Front

How do you calculate the total amount needed when making multiple items?

Back

Multiply the amount needed for one item by the number of items. For example, if one cake requires 2/3 cup of sugar, for five cakes, you need 2/3 * 5 = 3 1/3 cups.

Front

What is 30% of a total number?

Back

To find 30% of a total number, multiply the total by 0.30. For example, for 190 students, 30% is 190 * 0.30 = 57 students.

Front

What does it mean to estimate a percentage?

Back

Estimating a percentage means finding a close approximation rather than an exact number. This is often done by rounding numbers to make calculations easier.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide by 100. For example, 30% becomes 0.30.