PERCENTAGES Review of Introductory MathematicsExpress 1200% in decimal form.120010012PercentDifferentialPercent 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 specifiedcondition.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 whatpercent 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: = 0.1550Step 3: 0.1 x 100 = 10% Five gallons represents 10% of the original 50 gals thatwere in the tank.MA-01 Page 58 Rev. 0