Sigma J.

asked • 04/17/25

lawrence ran 5km in 5/8 of an hour. skyler ran 5km in 4/10 of an hour. how much faster was skyler than lawrence

Kayla B.

tutor
First things first, you need to set up a subtraction problem: 5/8 - 4/10. From here, you find the greatest common denominator which in this case is 40 since 5 x 8 equals 40. So, multiply 8 by 5 and 5 by 5. Do the same for the other side: multiply 10 by 4 and 4 by 4. It will look something like the example below: 5 (5) 4 (4) 25 16 / - / = / - / 8 (5) 10 (4) 40 40 So now you need to subtract both fractions. Remember that you only subtract the top numbers (numerators: 25 and 16). The denominators will stay the same. 25/40 - 16/40 equals 9/40. Final answer: Skyler was 9/40 of an hour faster than Lawrence.
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04/21/25

1 Expert Answer

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Raymond B. answered • 06/27/25

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5 (2)

Math, microeconomics or criminal justice

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lawrence ran 5k in 5/8 hour = 300/8 =150/4 =75/2 = 37.5 minutes

Skyler ran 5k in 4/10 hour = 2/5 hr =120/5 = 24 minutes


Lawrence is 37.5-24 = 13.5 minutes slower

Skyler is 13.5 minutes faster


or


5/8-4/10 = 5/8 -2/5 = 25/40 - 16/40 = 9/40 hour faster 9/40 hr = 13.5 minutes

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