Subtract 90/9 from 8/70, Solve 8/70

Subtract 90/9 from 8/70

1^st number: 8/70, 2^nd number: 10 0/9

8/70 - 90/9 is -346/35.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 9 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 70 × 9 = 630,
8/70 = 8 × 9/70 × 9 = 72/630
Likewise, for the 2nd fraction, since 9 × 70 = 630,
90/9 = 90 × 70/9 × 70 = 6300/630
Subtract the two like fractions:
72/630 - 6300/630 = 72 - 6300/630 = -6228/630
After reducing the fraction, the answer is -346/35

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