Subtract 70/18 from 6/7, Solve 6/7 - 3 16/18 as a fraction

Subtract 70/18 from 6/7

1^st number: 6/7, 2^nd number: 3 16/18

6/7 - 70/18 is -191/63.

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

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 7 × 18 = 126,
6/7 = 6 × 18/7 × 18 = 108/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126
Subtract the two like fractions:
108/126 - 490/126 = 108 - 490/126 = -382/126
After reducing the fraction, the answer is -191/63

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