Subtract 72/42 from 12/50, Solve 12/50

Subtract 72/42 from 12/50

1^st number: 12/50, 2^nd number: 1 30/42

12/50 - 72/42 is -258/175.

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

Next, find the equivalent fraction of both fractional numbers with denominator 1050
For the 1st fraction, since 50 × 21 = 1050,
12/50 = 12 × 21/50 × 21 = 252/1050
Likewise, for the 2nd fraction, since 42 × 25 = 1050,
72/42 = 72 × 25/42 × 25 = 1800/1050
Subtract the two like fractions:
252/1050 - 1800/1050 = 252 - 1800/1050 = -1548/1050
After reducing the fraction, the answer is -258/175

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