Subtract 70/63 from 6/90, Solve 6/90

Subtract 70/63 from 6/90

1^st number: 6/90, 2^nd number: 1 7/63

6/90 - 70/63 is -47/45.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 63 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 63 × 10 = 630,
70/63 = 70 × 10/63 × 10 = 700/630
Subtract the two like fractions:
42/630 - 700/630 = 42 - 700/630 = -658/630
After reducing the fraction, the answer is -47/45

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