Subtract 63/7 from 6/90, Solve 6/90

Subtract 63/7 from 6/90

1^st number: 6/90, 2^nd number: 9 0/7

6/90 - 63/7 is -134/15.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 90 × 7 = 630,
6/90 = 6 × 7/90 × 7 = 42/630
Likewise, for the 2nd fraction, since 7 × 90 = 630,
63/7 = 63 × 90/7 × 90 = 5670/630
Subtract the two like fractions:
42/630 - 5670/630 = 42 - 5670/630 = -5628/630
After reducing the fraction, the answer is -134/15

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