Percent Proportions

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is denoted by the symbol '%'. For example, 50% means 50 out of 100.

Front

How do you calculate the percent of a number?

Back

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

Front

What is the formula to find the percent of a part compared to a whole?

Back

The formula is: (Part/Whole) * 100 = Percent. For example, if you have 9 out of 90, the percent is (9/90) * 100 = 10%.

Front

What does it mean if a student scores 80% on a test?

Back

It means the student answered 80 out of every 100 questions correctly, or they got 80% of the questions right.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the top number (numerator) by the bottom number (denominator) and then multiply by 100. For example, 1/4 = (1 ÷ 4) * 100 = 25%.

Front

What is 10% of 200?

Back

10% of 200 is 20. (200 * 0.10 = 20)

Front

If 15 is 30% of a number, what is the number?

Back

The number is 50. (15 = 0.30 * Number, so Number = 15 / 0.30 = 50)

Front

What is the percent increase if a price goes from $50 to $75?

Back

The percent increase is 50%. ((75 - 50) / 50) * 100 = 50%.

Front

How do you find the total number of items if you know the percent and the part?

Back

Use the formula: Total = Part / (Percent/100). For example, if 18 is 72% of the total, Total = 18 / (72/100) = 25.

Front

What is 25% of 80?

Back

25% of 80 is 20. (80 * 0.25 = 20)