Subtract 72/60 from 49/42, Solve 1 7/42

Subtract 72/60 from 49/42

1^st number: 1 7/42, 2^nd number: 1 12/60

49/42 - 72/60 is -1/30.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 60 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 42 × 10 = 420,
49/42 = 49 × 10/42 × 10 = 490/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
72/60 = 72 × 7/60 × 7 = 504/420
Subtract the two like fractions:
490/420 - 504/420 = 490 - 504/420 = -14/420
After reducing the fraction, the answer is -1/30

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