Subtract 80/54 from 8/7, Solve 1 1/7

Subtract 80/54 from 8/7

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

8/7 - 80/54 is -64/189.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 7 × 54 = 378,
8/7 = 8 × 54/7 × 54 = 432/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
80/54 = 80 × 7/54 × 7 = 560/378
Subtract the two like fractions:
432/378 - 560/378 = 432 - 560/378 = -128/378
After reducing the fraction, the answer is -64/189

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