Actually it depends on question if questions based on single formula and there is no other way to do, then mostly they don't give you band of answer. They want single answer and if there can be number of ways to solve the question then definitely ... Solution to Problem 6 Percent increase from 30 to 40 is given by (40 - 30) / 30 = 10 / 30 = 0.33 = 33% (2 significant digits) Percent decrease from 40 to 30 is given by (40 - 30) / 40 = 0.25 = 25% In absolute term, the percent decrease is less than the percent increase. Problem 7 A family had dinner in a restaurant and paid $30 for food.
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