Ch. 6 Review

Front

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

Back

Percentage = (Part / Whole) × 100

Front

If 18 out of 200 residents were not born in Massachusetts, how do you find the percentage of those residents?

Back

Percentage = (18 / 200) × 100 = 9%

Front

What is 23.2% of 125?

Back

23.2% of 125 = 29

Front

How do you calculate the number of girls if 40% of 200 children are boys?

Back

Number of girls = Total children - Number of boys = 200 - (40% of 200) = 120

Front

What does it mean if 30% of a group is in color?

Back

It means that 30 out of every 100 items in the group are in color.

Front

How do you convert a fraction to a percentage?

Back

Multiply the fraction by 100.

Front

What is the percentage representation of 62 out of 100?

Back

62% (since 62 out of 100 is the same as 62/100)

Front

If a class has 30 students and 60% are girls, how many girls are in the class?

Back

Number of girls = 60% of 30 = 18 girls.

Front

What is the relationship between fractions, decimals, and percentages?

Back

They are different ways to represent the same value.

Front

How do you find the percentage of a number?

Back

Multiply the number by the percentage (as a decimal).