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14 July, 21:12

The cost of a transistor decreases from 400 to 380. What is the percentage of decrease?

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  1. 14 July, 21:29
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    The amount of the decrease is (400 - 380) = 20.

    As a fraction of the original cost, the decrease is

    (20 / 400) = 0.05 = a decrease of 5%
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