Subtract 90/63 from 1/8, Solve 1/8 - 1 27/63 as a fraction

Subtract 90/63 from 1/8

1^st number: 1/8, 2^nd number: 1 27/63

1/8 - 90/63 is -73/56.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 63 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 8 × 63 = 504,
1/8 = 1 × 63/8 × 63 = 63/504
Likewise, for the 2nd fraction, since 63 × 8 = 504,
90/63 = 90 × 8/63 × 8 = 720/504
Subtract the two like fractions:
63/504 - 720/504 = 63 - 720/504 = -657/504
After reducing the fraction, the answer is -73/56

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