Subtract 80/54 from 7/28, Solve 7/28

Subtract 80/54 from 7/28

1^st number: 7/28, 2^nd number: 1 26/54

7/28 - 80/54 is -133/108.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 54 is 756

Next, find the equivalent fraction of both fractional numbers with denominator 756
For the 1st fraction, since 28 × 27 = 756,
7/28 = 7 × 27/28 × 27 = 189/756
Likewise, for the 2nd fraction, since 54 × 14 = 756,
80/54 = 80 × 14/54 × 14 = 1120/756
Subtract the two like fractions:
189/756 - 1120/756 = 189 - 1120/756 = -931/756
After reducing the fraction, the answer is -133/108

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