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Changing Common Fractions and Whole Numbers to Percent
Ratio

Mathematics Volume 1 of 2
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PERCENTAGES Review of Introductory Mathematics Express 1200% in decimal form. 1200 100 12 Percent Differential Percent differentials are used to provide a means of comparing changes in quantities or amounts. Percent differentials express the relationship between some initial condition and another specified condition. The method of calculating percent differential involves the following: Step 1: Subtract the original value from the present value. Step 2: Divide by the original value. Step 3: Multiply by 100. Step 4: Add the percent symbol (%). Example: A  tank  initially  contains  50  gallons  of  water.   Five  gallons  are  drained  out.   By  what percent is the amount of water in the tank reduced? Solution: Step 1: The difference between initial and final is given in the problem:  5 gallons. Step 2: = 0.1 5 50 Step 3: 0.1 x 100 = 10%   Five gallons represents 10% of the original 50 gals that were in the tank. MA-01 Page 58 Rev. 0







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