Subtract 80/49 from 75/80, Solve 75/80

Subtract 80/49 from 75/80

1^st number: 75/80, 2^nd number: 1 31/49

75/80 - 80/49 is -545/784.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 49 is 3920

Next, find the equivalent fraction of both fractional numbers with denominator 3920
For the 1st fraction, since 80 × 49 = 3920,
75/80 = 75 × 49/80 × 49 = 3675/3920
Likewise, for the 2nd fraction, since 49 × 80 = 3920,
80/49 = 80 × 80/49 × 80 = 6400/3920
Subtract the two like fractions:
3675/3920 - 6400/3920 = 3675 - 6400/3920 = -2725/3920
After reducing the fraction, the answer is -545/784

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