Subtract 60/50 from 15/42, Solve 15/42

Subtract 60/50 from 15/42

1^st number: 15/42, 2^nd number: 1 10/50

15/42 - 60/50 is -59/70.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 50 is 1050

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 42 × 25 = 1050,
15/42 = 15 × 25/42 × 25 = 375/1050
Likewise, for the 2nd fraction, since 50 × 21 = 1050,
60/50 = 60 × 21/50 × 21 = 1260/1050
Subtract the two like fractions:
375/1050 - 1260/1050 = 375 - 1260/1050 = -885/1050
After reducing the fraction, the answer is -59/70

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