Ravi spends 3/8 of his money and has $135 left. What percentage of his original amount did he spend?
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Worked Solution
Step 1: Ravi has 3/8 spent, so he has 1 - 3/8 = 5/8 left.
Step 2: 5/8 of original = $135, so original = $135 ÷ 5 × 8 = $27 × 8 = $216.
Step 3: Amount spent = 3/8 × $216 = $81.
Step 4: Percentage spent = $81 ÷ $216 × 100% = 37.5%.
Alternatively: 3/8 directly = 3 ÷ 8 × 100% = 37.5%.
Correct answer: 37.5%
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