Subtract 80/49 from 60/81, Solve 60/81

Subtract 80/49 from 60/81

1^st number: 60/81, 2^nd number: 1 31/49

60/81 - 80/49 is -1180/1323.

Find the least common denominator or LCM of the two denominators:
LCM of 81 and 49 is 3969

Next, find the equivalent fraction of both fractional numbers with denominator 3969
For the 1st fraction, since 81 × 49 = 3969,
60/81 = 60 × 49/81 × 49 = 2940/3969
Likewise, for the 2nd fraction, since 49 × 81 = 3969,
80/49 = 80 × 81/49 × 81 = 6480/3969
Subtract the two like fractions:
2940/3969 - 6480/3969 = 2940 - 6480/3969 = -3540/3969
After reducing the fraction, the answer is -1180/1323

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