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Question

If the price of milk decreases from ₹ 32 per litre to ₹ 24 per litre then the percentage decrease in price is .
  1. 35 %
  2. 25 %
  3. 15 %


Solution

The correct option is B 25 %
Let the percentage decrease be x%

Given: initial price = ₹ 32 and final price = ₹ 24
Final price = initial price - x% of initial price
24 = 32 - x% of 32
24=32x100×32
x=(3224)×10032
x=8×10032
x=1004=25
The percentage decrease in price is 25%

Alternatively,
By formula,
New value=Initial value×(100% decrease100)
Given: New value = ₹ 24 and Initial value = ₹ 32
24=32×(100x100)
2432×100=100x

34×100=100x
75=100x
x=10075=25
The percentage decrease in price is 25%
 

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