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7 September, 09:00

There were 80 runners to start a race. In the first half of the race, 1/4 of them dropped out. In the second half of the race, 2/5 of the remaining runners dropped out. How many runners finished the race?

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  1. 7 September, 09:08
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    36 runners finished the race.

    Step-by-step explanation:

    In the first half of the race, 1/4 of them dropped, so we need to calculate 1/4 of 80:

    (1/4) * 80 = 80/4 = 20

    If 20 runners dropped out, now we have 80 - 20 = 60 runners.

    Then, in the second half, 2/5 of the remaining runners dropped out, so:

    (2/5) * 60 = 2*60/5 = 120/5 = 24

    If 24 runners dropped out, now we have 60 - 24 = 36 runners.

    So, 36 runners finished the race.
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