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Maths Shopkeeper Problem

Maths Shopkeeper Problem Solution - 27 September

A brand new Beats Headphone was on sale at 20% as a promotional offer. By what percent must the headphone price be increased to sell it at the original price again ?

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Solution
25%.

Suppose a $10 item is reduced by 20%, the price will drop to $8. Now to make it the original price we must add $2 more which is 25% of $8.