By selling 100 Diwali cards, a shopkeeper gains the SP of 40 cards Find his gain % - Maths - Data Handling

Question

By selling 100 Diwali cards, a shopkeeper gains the SP of 40
cards Find his gain %

Abhishek Kr. Jha · Accepted Answer

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By selling 100 Diwali cards, a shopkeeper gains the SP of 40 cards. Find his gain %.