Ratios, Rates, Percentages Unit Test

Front

What is a ratio?

Back

A ratio is a relationship between two numbers that shows how many times the first number contains the second.

Front

How do you calculate a percentage?

Back

To calculate a percentage, divide the part by the whole and then multiply by 100.

Front

What is the formula for finding the percentage of a quantity?

Back

Percentage = (Part / Whole) x 100.

Front

If 39 out of 65 students are visiting America for the first time, how do you find the percentage?

Back

Divide 39 by 65 and multiply by 100 to get 60%.

Front

What does a ratio of 4:1 mean in the context of students?

Back

It means for every 4 sixth graders, there is 1 seventh grader.

Front

If there are 8 seventh graders in a 4:1 ratio, how many sixth graders are there?

Back

There are 32 sixth graders (4 times 8).

Front

What is the percentage of blue beads in a necklace with 10 blue beads and 90 white beads?

Back

The percentage of blue beads is (10 / 100) x 100 = 10%.

Front

How do you determine what percent of a book has been read?

Back

Divide the number of pages read by the total number of pages and multiply by 100.

Front

If Gary read 80 pages of a 320-page book, what percent of the book did he read?

Back

He read 25% of the book (80 / 320 x 100).

Front

How do you compare two prices to determine the better deal?

Back

Calculate the price per ounce for each option and compare them.