This weekend karen participated in a road race. The ratio of the number of miles she ran to the number of miles she walked is 4: 5. how many miles did karen run if she walked 10 miles
4 miles run : 5 miles walk : : x miles run : 10 miles walked
4 / 5 = x / 10
Now multiply by 10 on both sides, we get
10 * 4 / 5 = x
40 / 5 = x
8 = x
x = 8
Hence if she walked 10 miles, then she have run 8 miles.
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