the marks in their test decreased from 40 to 30 the percent decrease is how much​

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the marks in their test decreased from 40 to 30 the percent decrease is how much​

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2 thoughts on “the marks in their test decreased from 40 to 30 the percent decrease is how much​”

  1. Answer:

    10%

    Step-by-step explanation:

    Assuming the marks are out of 100,

    the marks in the test decreased from 40 to 30

    Therefore, 40 is equal to 40/100×100 (40% of 100)

    and 30 is equal to 30/100×100 (30% of 100)

    And hence the percent decrease is

    (40-30)%

    10%

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