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Question
A boy eats 25% of the cake and gives away 35% of it to his friends. What percent of the cake is still left with him?
Solution
Let total cake = 100
Cake which was eaten by the boy = 25
Cake which was given to his friends = 35
∴ Balance cake = 100 - (25 + 35)
= 100 - 60 = 40
Hence he has 40% of the cake with him.
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