Subtract 40/7 from 80/54, Solve 1 26/54

Subtract 40/7 from 80/54

1^st number: 1 26/54, 2^nd number: 5 5/7

80/54 - 40/7 is -800/189.

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

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 54 × 7 = 378,
80/54 = 80 × 7/54 × 7 = 560/378
Likewise, for the 2nd fraction, since 7 × 54 = 378,
40/7 = 40 × 54/7 × 54 = 2160/378
Subtract the two like fractions:
560/378 - 2160/378 = 560 - 2160/378 = -1600/378
After reducing the fraction, the answer is -800/189

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