Subtract 90/9 from 27/70, Solve 27/70

Subtract 90/9 from 27/70

1^st number: 27/70, 2^nd number: 10 0/9

27/70 - 90/9 is -673/70.

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,
27/70 = 27 × 9/70 × 9 = 243/630
Likewise, for the 2nd fraction, since 9 × 70 = 630,
90/9 = 90 × 70/9 × 70 = 6300/630
Subtract the two like fractions:
243/630 - 6300/630 = 243 - 6300/630 = -6057/630
After reducing the fraction, the answer is -673/70

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