Subtract 70/18 from 12/70, Solve 12/70

Subtract 70/18 from 12/70

1^st number: 12/70, 2^nd number: 3 16/18

12/70 - 70/18 is -1171/315.

Find the least common denominator or LCM of the two denominators:
LCM of 70 and 18 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 70 × 9 = 630,
12/70 = 12 × 9/70 × 9 = 108/630
Likewise, for the 2nd fraction, since 18 × 35 = 630,
70/18 = 70 × 35/18 × 35 = 2450/630
Subtract the two like fractions:
108/630 - 2450/630 = 108 - 2450/630 = -2342/630
After reducing the fraction, the answer is -1171/315

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