Percentages

Front

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

Back

To calculate the percentage of a part compared to a whole, use the formula: (part/whole) x 100. For example, if 12 out of 30 cars finished a race, the percentage is (12/30) x 100 = 40%.

Front

What does it mean if a figure is shaded 60%?

Back

If a figure is shaded 60%, it means that 60% of the total area of the figure is covered or filled in.

Front

How do you calculate a student's grade percentage based on points earned and total points possible?

Back

To calculate a student's grade percentage, use the formula: (points earned/total points possible) x 100. For example, if a student earned 60 points out of 75, the percentage is (60/75) x 100 = 80%.

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, 0.04 becomes 4%.

Front

What is 100% of a number?

Back

100% of a number is the number itself. For example, 100% of 50 is 50.

Front

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

Back

Fractions, decimals, and percentages are different ways to represent the same value. For example, 1/2 is equivalent to 0.5 and 50%.

Front

If 25% of a class of 40 students are absent, how many students are absent?

Back

To find the number of absent students, calculate 25% of 40: (25/100) x 40 = 10 students.

Front

What is the percent increase formula?

Back

The percent increase formula is: ((new value - original value) / original value) x 100.

Front

What is the percent decrease formula?

Back

The percent decrease formula is: ((original value - new value) / original value) x 100.