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The price of petrol was raised by 15%. B...

The price of petrol was raised by 15%. By how much percentage should a motorist reduce the consumption of petrol so that the expenditure on it does not increase?
पेट्रोल की कीमत 15% से बढ़ गयी | एक वाहन मालिक को पेट्रोल की खपत कितनी कम करनी चाहिए ताकि इस पर किये गए व्यय में वृद्धि ना हो ?

A

`9 2/11%`

B

`15 3/13%`

C

`13 1/23%`

D

`6 7/8%`

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