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Question
Solve: y + 20% of y = 18
Solution
y + 20% of y = 18
⇒ y + `20/100 xx "y" = 18`
⇒ `(100"y" + 20"y")/100 = 18`
⇒ 100y + 20y = 18 × 100
⇒ 100y+ 20y = 1800
⇒ 120y = 1800
⇒ y = `1800/120 = 15`
∴ y = 15
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