OCS Math Module 3 Final Exam Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing the relative size of one quantity to another, often expressed in the form 'a:b'.

Front

How do you write a ratio comparing the number of girls to boys if there are 28 students and 16 are boys?

Back

The number of girls is 28 - 16 = 12. The ratio of girls to boys is 12:16.

Front

What is the result of multiplying 1/3 by 5/6?

Back

1/3 x 5/6 = 5/18.

Front

What method can be used to solve proportions?

Back

Proportions can be solved using cross multiplication.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply by 100.

Front

What is 4/10 expressed as a decimal?

Back

4/10 = 0.4.

Front

What percent of 20 is 4?

Back

4 is 20% of 20.

Front

Define 'proportion' in mathematics.

Back

A proportion is an equation that states that two ratios are equal.

Front

What is cross multiplication?

Back

Cross multiplication is a method used to solve proportions by multiplying the numerator of one ratio by the denominator of the other ratio.

Front

How do you find the percentage of a number?

Back

To find the percentage of a number, divide the part by the whole and multiply by 100.