Percent Proportion Practice

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 find what percent one number is of another?

Back

To find what percent one number (A) is of another number (B), use the formula: (A/B) x 100. For example, to find what percent 8 is of 20, calculate (8/20) x 100 = 40%.

Front

What is 15% of 60?

Back

15% of 60 is calculated as (15/100) x 60 = 9.

Front

If 20 is 80% of what number, how do you find that number?

Back

To find the number (X) when you know a part (20) and the percent (80%), use the formula: X = (Part / Percent) x 100. So, X = (20 / 80) x 100 = 25.

Front

How do you calculate the total cost if you know the price per item and the number of items?

Back

Total Cost = Price per Item x Number of Items. For example, if raspberries cost $7 per carton and Ida buys 8 cartons, the total cost is 7 x 8 = $56.

Front

What is the formula to find the percentage increase?

Back

Percentage Increase = [(New Value - Old Value) / Old Value] x 100. This shows how much a value has increased in relation to its original value.

Front

What is the formula to find the percentage decrease?

Back

Percentage Decrease = [(Old Value - New Value) / Old Value] x 100. This shows how much a value has decreased in relation to its original value.

Front

How do you convert a fraction to a percent?

Back

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

Front

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

Back

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

Front

If Mr. Dulin runs 5 miles in 42 minutes, how do you find his speed in miles per minute?

Back

Speed = Distance / Time. So, Mr. Dulin's speed is 5 miles / 42 minutes = approximately 0.119 miles per minute.