Subtract 56/81 from 54/80, Solve 54/80

Subtract 56/81 from 54/80

54/80 - 56/81 is -53/3240.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 81 is 6480

Next, find the equivalent fraction of both fractional numbers with denominator 6480
For the 1st fraction, since 80 × 81 = 6480,
54/80 = 54 × 81/80 × 81 = 4374/6480
Likewise, for the 2nd fraction, since 81 × 80 = 6480,
56/81 = 56 × 80/81 × 80 = 4480/6480
Subtract the two like fractions:
4374/6480 - 4480/6480 = 4374 - 4480/6480 = -106/6480
After reducing the fraction, the answer is -53/3240

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