Official Guide Explanation:
Problem Solving #187




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Solution and Metadata

Question: 187
Page: 179
Difficulty: 6 (Moderately Difficult)
Category 1: Arithmetic > Percents > other
Category 2: Arithmetic > Fractions >
Category 3: Algebra > Linear Equations-One Unk >

Explanation: It's easiest to convert each fraction to a percent without adding them. (1/50) of something is 2% of it. If that isn't intuitive, remember that a percent is, by definition, (1/100), so since (1/50) is twice (1/100), it must be 2%. (1/25) is double (1/50), so (1/25) of something is 4% of it. Thus, the answer is 2% + 4% = 6%, choice (A).

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