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Finding the Percentage Increase or Decrease

If the cost o...

Question

If the cost of a book worth ₹50 is increased by ₹25, then the percentage increase in its price is _____ .

A

$25 %$

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B

$20 %$

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C

$50 %$

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D

$10 %$

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Solution

The correct option is C
$50 %$

Original cost of the book = ₹50
Amount by which cost of the book is increased = ₹25
i.e., the amount of change = ₹25
$P e r c e n t a g e i n c r e a s e = \frac{A m o u n t o f c h a n g e}{O r i g i n a l c o s t} \times 100 = \frac{25}{50} \times 100 = 50 %$

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