1 packet of biscuits costs Rs 16 but a pack of 4 of the same packet of biscuits costs Rs 56. What is the effective discount (in %) on the pack?
Cost of 1 pack=Rs 16
Cost of 4 packs=Rs 64
But a set of 4 pack=Rs 56
Effective discount=((64-56)/64)*100
=100/8
=12.5 %Â
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