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3 January, 21:01

Which sentence matches the mathematical equation? p-0.40p=0.60p

a. Decreased by 40 is the same as multiply by 60

b. Decreased by 40 is the same as increase by 60

c. Decreased by 40% is the same as multiply by 60%

d. Decreased by 40% is the same as increased by 60%

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  1. 3 January, 21:30
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    P-0.40p = 0.60p

    C. Decrease by 40% is the same as multiply by 60%.

    Assume that p = 10

    10 - 0.40 (10) = 0.60 (10)

    10 - 4 = 6

    6 = 6

    Based on the above assumption. 40% of 10 is 4; and 60% of 10 is 6. So, 10 less 4 (40% of 10) is equal to 6 (60% of 10).

    Percentage is used because 0.40 and 0.60 will be multiplied with 100% to get the equivalent percentage 0.40 x 100% = 40%; 0.60 x 100% = 60%
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