Subtract 80/49 from 50/72, Solve 50/72

Subtract 80/49 from 50/72

1^st number: 50/72, 2^nd number: 1 31/49

50/72 - 80/49 is -1655/1764.

Find the least common denominator or LCM of the two denominators:
LCM of 72 and 49 is 3528

Next, find the equivalent fraction of both fractional numbers with denominator 3528
For the 1st fraction, since 72 × 49 = 3528,
50/72 = 50 × 49/72 × 49 = 2450/3528
Likewise, for the 2nd fraction, since 49 × 72 = 3528,
80/49 = 80 × 72/49 × 72 = 5760/3528
Subtract the two like fractions:
2450/3528 - 5760/3528 = 2450 - 5760/3528 = -3310/3528
After reducing the fraction, the answer is -1655/1764

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