Subtract 10/7 from 16/18, Solve 16/18

Subtract 10/7 from 16/18

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

16/18 - 10/7 is -34/63.

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,
16/18 = 16 × 7/18 × 7 = 112/126
Likewise, for the 2nd fraction, since 7 × 18 = 126,
10/7 = 10 × 18/7 × 18 = 180/126
Subtract the two like fractions:
112/126 - 180/126 = 112 - 180/126 = -68/126
After reducing the fraction, the answer is -34/63

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