The price of fuel decreases by 40%, 50% and 15%
The price of fuel decreases by 40%, 50% and 15% in three successive months, but increases by 40% in the fourth month. What is the percentage increase/decrease in the price of fuel in the fourth month as compared to its original price?
ईंधन की कीमत क्रमागत तीन महीनों में 40%, 50% और 15% कम की गई है, लेकिन चौथे महीने में 40% वृद्धि की गई है। चौथे महीने में ईंधन की कीमत में उसकी मूल कीमत की तुलना में कितने प्रतिशत की वृद्धि/कमी हुई है?
Detailed Solution & Logic
Decreases by / कमी 64.3%
Let original price = 100
After 40% decrease = $ 100 \times 0.6 = 60 $
After 50% decrease = $ 60 \times 0.5 = 30 $
After 15% decrease = $ 30 \times 0.85 = 25.5 $
After 40% increase = $ 25.5 \times 1.4 = 35.7 $
Net change = 100 - 35.7 = 64.3
Answer = 64.3% decrease
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