# 15% less calories per serving

• How do you solve the following problem?

Jolly bread has 140 calories per serving.

This is 15% less than the calories in a serving of Happy bread.

• How many calories are in a serving of Happy bread?

### Comments for 15% less calories per serving

 Oct 12, 2012 Percent Calculations by: Staff Answer: How to CALCULATE a PERCENT How to calculate a percent: Calculating a percent means a fraction (which represents the proportion) must be converted to a decimal, and then the decimal must be multiplied by 100. To complete this process: use a calculator or be prepared to do some division long hand. Converting the following fraction (proportion) to a percent: 63/75 Proportion = 63/75 = (63/75) * 100 = (.84) * 100 = 84 % How to USE the known PERCENT to solve for the calories in Happy Bread ``` Jolly bread has 140 calories per serving. J = 140 This is 15% less than the calories in a serving of Happy bread. J = H - 15% of H The word “of” means multiply J = H - 15% * H Convert 15% to a decimal by dividing 15 by 100 15% / 100 = .15 Substitute .15 for 15% J = H - 15% * H J = H - 0.15 * H Replace the J with 140 calories 140 = H - 0.15 * H Solve for H 140 = H - 0.15 * H 140 = H - 0.15H 140 = 0.85H 0.85H = 140 Divide each side of the equation by 0.85 0.85H / 0.85 = 140 / 0.85 H * (0.85 / 0.85) = 140 / 0.85 H * (1) = 140 / 0.85 H = 140 / 0.85 H = 164.706 calories ``` Final Answer:                  Happy Bread has 165 calories per serving Thanks for writing. Staff www.solving-math-problems.com

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