Practice Using & Converting Percentages

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare proportions.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 25% becomes 0.25.

Front

How do you convert a decimal to a percentage?

Back

To convert a decimal to a percentage, multiply the decimal by 100. For example, 0.75 becomes 75%.

Front

What does it mean to decrease by a percentage?

Back

To decrease by a percentage means to reduce a number by that percentage of its original value. For example, decreasing 100 by 20% means subtracting 20.

Front

If a class has 20 students and decreases by 35%, how many students are left?

Back

13 students.

Front

What is the total cost of an item that costs $328 with an additional 20% shipping fee?

Back

$393.60.

Front

How do you find the percentage of a fraction?

Back

To find the percentage of a fraction, divide the numerator by the denominator and then multiply by 100. For example, for 15/20, (15 ÷ 20) × 100 = 75%.

Front

Convert 175% into a decimal.

Back

1.75.

Front

Convert 26% into a decimal.

Back

0.26.

Front

What is the formula to calculate the percentage increase?

Back

Percentage Increase = ((New Value - Original Value) / Original Value) × 100.