3. After a 20% hike, the cost of a refrigerator is 15300. What was the original price of this
refrigerator?
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Answer:
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Step-by-step explanation:
After 20% hike know the original value is 100% + 20% = 120%
∴ we have know 120%
120% = 15300
100% = ?
∴we get original cost is
∴ 120÷100 = 15300÷ ?
∴ 120× a = 15300×100
120a = 1530000
∴ a = 1530000 ÷ 120
= 12750
∴ original cost is 12750
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