Subtract 63/60 from 9/42, Solve 9/42

Subtract 63/60 from 9/42

1^st number: 9/42, 2^nd number: 1 3/60

9/42 - 63/60 is -117/140.

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,
9/42 = 9 × 10/42 × 10 = 90/420
Likewise, for the 2nd fraction, since 60 × 7 = 420,
63/60 = 63 × 7/60 × 7 = 441/420
Subtract the two like fractions:
90/420 - 441/420 = 90 - 441/420 = -351/420
After reducing the fraction, the answer is -117/140

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