Subtract 90/63 from 12/14, Solve 12/14

Subtract 90/63 from 12/14

1^st number: 12/14, 2^nd number: 1 27/63

12/14 - 90/63 is -4/7.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 63 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 14 × 9 = 126,
12/14 = 12 × 9/14 × 9 = 108/126
Likewise, for the 2nd fraction, since 63 × 2 = 126,
90/63 = 90 × 2/63 × 2 = 180/126
Subtract the two like fractions:
108/126 - 180/126 = 108 - 180/126 = -72/126
After reducing the fraction, the answer is -4/7

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