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The price of an article is decreased by 10%. To restore its former value the new price must be increased by :
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- 10%
- 11%
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9 1 % 11 -
11 1 % 9
Correct Option: D
Let the original price be ₹100
New price after 10% decrease = ₹90
In order to restore the price to its original value, it must be increased by ₹10
% increase
| = | × 100 = | = 11 | % | |||
| 90 | 9 | 9 |
Aliter : Using Rule 9,
Required %
| = | × 100 % | 100 - 10 |
| = | % = 11 | % | ||
| 9 | 9 |
