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8 January, 20:43

Last week, you finished Level 2 of a video game in 32 minutes. Today, you finish Level 2 in 28 minutes. Is the percent of change an increase or a decrease? What is your percent of change?

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  1. 8 January, 21:00
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    1) The percent of change is a decrease, as the time needed to complete the level decreased. (28 < 32.)

    2) The percent of change can be worked out by doing:

    Original time taken (x) - new time (y) = z

    (z : x) * 100 = percent of change.

    So let's substitute the values in:

    32 - 28 = 4

    (4 : 32) * 100 = 12.5%.

    The answer is 12.5%.
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