Percent Proportion

Front

What is a percent proportion?

Back

A percent proportion is a way to express a part of a whole as a percentage. It is often used to find out how much one quantity is in relation to another.

Front

How do you calculate the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (as a decimal). For example, to find 20% of 50, calculate 50 x 0.20 = 10.

Front

What is the formula to find the whole when given a part and a percent?

Back

The formula is: Whole = Part / (Percent as a decimal). For example, if 14 is 20% of a number, the whole is 14 / 0.20 = 70.

Front

If 40% of a number is 92, what is the number?

Back

The number is 92 / 0.40 = 230.

Front

What does it mean if a pitcher won 80% of the games he pitched?

Back

It means that out of all the games he pitched, 80% were wins. If he pitched 35 games, he won 28 games (35 x 0.80 = 28).

Front

How do you find the percentage of seats that are empty in a theater?

Back

To find the percentage of empty seats, subtract the number of sold seats from the total seats, then divide by the total seats and multiply by 100. For example, (250 - 225) / 250 x 100 = 10%.

Front

What is 45% of 50?

Back

45% of 50 is 22.5 (50 x 0.45 = 22.5).

Front

If a student scored 75% on a test with 40 questions, how many questions did they answer correctly?

Back

They answered 30 questions correctly (40 x 0.75 = 30).

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by dividing the numerator by the denominator and multiplying by 100. For example, 1/4 = 0.25 = 25%.

Front

How do you express 10 out of 50 as a percentage?

Back

To express 10 out of 50 as a percentage, divide 10 by 50 and multiply by 100. So, (10 / 50) x 100 = 20%.