Solving Percent Word Problems

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents how much of something there is out of a total of 100.

Front

How do you calculate the percentage of a number?

Back

To calculate the percentage of a number, multiply the number by the percentage (in decimal form) and then divide by 100.

Front

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

Back

Total = Part / (Percent / 100) or Total = Part * (100 / Percent).

Front

If a student answers 80% of 20 problems correctly, how many problems did they answer correctly?

Back

16 problems.

Front

How do you find what percent one number is of another?

Back

To find what percent one number is of another, divide the first number by the second number and multiply by 100.

Front

What is the equation to represent a constant rate of change?

Back

y = kx, where y is the total, k is the rate, and x is the number of units.

Front

If 29 out of 36 carpenters showed up for work, what percent showed up?

Back

About 80.6%.

Front

How do you find the regular price if you know the sale price and the discount percentage?

Back

Regular Price = Sale Price / (1 - Discount Rate).

Front

If a metal bar weighs 8.15 ounces and 93% is silver, how do you find the weight of the silver?

Back

Weight of Silver = Total Weight * (Percent of Silver / 100).

Front

What is the formula to convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply the decimal by 100 and add a percent sign.