Chapter 5 Test

Front

What is the process to convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply the decimal by 100 and add a percent sign (%). For example, 0.81 x 100 = 81%.

Front

How do you calculate 10% of a given amount?

Back

To calculate 10% of a given amount, divide the amount by 10. For example, 10% of $100 is $100 ÷ 10 = $10.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

How do you find the ratio of two quantities?

Back

To find the ratio of two quantities, divide each quantity by the greatest common divisor (GCD) of the two numbers. For example, the ratio of 13 boys to 10 girls is 13:10.

Front

What does it mean for two ratios to be equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities. For example, 8:9 is equivalent to 24:27.

Front

How can you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both terms of the ratio by their greatest common divisor (GCD).

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, 1/2 = 2/4 is a proportion.

Front

How do you determine if a proportion is true or false?

Back

To determine if a proportion is true, cross-multiply the terms and check if the products are equal. If they are equal, the proportion is true.

Front

What is the relationship between percentages and fractions?

Back

Percentages are a way to express a fraction out of 100. For example, 25% is equivalent to 25/100 or 1/4.

Front

How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100. For example, 81% = 81 ÷ 100 = 0.81.