Subtract 70/7 from 7/18, Solve 7/18

Subtract 70/7 from 7/18

1^st number: 7/18, 2^nd number: 10 0/7

7/18 - 70/7 is -173/18.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
7/18 = 7 × 7/18 × 7 = 49/126
Likewise, for the 2nd fraction, since 7 × 18 = 126,
70/7 = 70 × 18/7 × 18 = 1260/126
Subtract the two like fractions:
49/126 - 1260/126 = 49 - 1260/126 = -1211/126
After reducing the fraction, the answer is -173/18

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