The cost of a toy is 31/3 and that of a book is 21/5. Joe paid Rs. 20 to the shopkeeper. How much money did he get back?
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Step-by-step explanation:
31/3+21/5
LCM of 3 and 5 is 15
31*5/3*5 + 21*3/5*3
155/15+63/15
178/15
20-178/15
20/1-178/15
LCM of 1 and 15 is 15
20*15/1*15-178*1/15*1
300/15-178/15
₹122/15=₹8.333333333333................
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