Subtract 80/14 from 90/18, Solve 5 0/18

Subtract 80/14 from 90/18

1^st number: 5 0/18, 2^nd number: 5 10/14

90/18 - 80/14 is -5/7.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 14 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
90/18 = 90 × 7/18 × 7 = 630/126
Likewise, for the 2nd fraction, since 14 × 9 = 126,
80/14 = 80 × 9/14 × 9 = 720/126
Subtract the two like fractions:
630/126 - 720/126 = 630 - 720/126 = -90/126
After reducing the fraction, the answer is -5/7

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