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Question
I bought wheat worth Rs. `12 1/2`, rice worth Rs. `25 3/4` and vegetables worth Rs. `10 1/4`. If I gave a hundred rupee note to the shopkeeper; how much did he return to me ?
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Solution
Money given to shopkeeper = Rs. 100
Total amount of goods bought
= Rs.`(12 1/2+25 3/4+10 1/4)` .......(Wheat, Rice, and Vegetable)
= `25/2+103/4+41/4`
= `(25 xx 2)/(2 xx 2) +103/4 + 41/4`
= `50/4 + 103/4 + 41/4`
= `(50+103+41)/4`
= Rs.`194/4`
∴ Money returned by shopkeeper
= Rs.`(100-194/4)`
By taking LCM,
= Rs.`(400-194)/4`
= `206/4`
= Rs.`103/2`
= Rs. `51 1/2.`
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