Subtract 18/9 from 9/70, Solve 9/70

Subtract 18/9 from 9/70

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

9/70 - 18/9 is -131/70.

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,
9/70 = 9 × 9/70 × 9 = 81/630
Likewise, for the 2nd fraction, since 9 × 70 = 630,
18/9 = 18 × 70/9 × 70 = 1260/630
Subtract the two like fractions:
81/630 - 1260/630 = 81 - 1260/630 = -1179/630
After reducing the fraction, the answer is -131/70

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