Subtract 90/54 from 81/28, Solve 2 25/28

Subtract 90/54 from 81/28

1^st number: 2 25/28, 2^nd number: 1 36/54

81/28 - 90/54 is 103/84.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 54 is 756

Next, find the equivalent fraction of both fractional numbers with denominator 756
For the 1st fraction, since 28 × 27 = 756,
81/28 = 81 × 27/28 × 27 = 2187/756
Likewise, for the 2nd fraction, since 54 × 14 = 756,
90/54 = 90 × 14/54 × 14 = 1260/756
Subtract the two like fractions:
2187/756 - 1260/756 = 2187 - 1260/756 = 927/756
After reducing the fraction, the answer is 103/84
In mixed form: 119/84

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