12. By selling 100 oranges, a vendor gains a profit equal to the selling price of 20 oranges. Find his gain per cent
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Answer:
Determining Percentage Gain or Loss
Take the selling price and subtract the initial purchase price. The result is the gain or loss.
Take the gain or loss from the investment and divide it by the original amount or purchase price of the investment.
Finally, multiply the result by 100 to arrive at the percentage change in the investment.
Step-by-step explanation:
means 80
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