Subtract 56/9 from 90/28, Solve 3 6/28

Subtract 56/9 from 90/28

1^st number: 3 6/28, 2^nd number: 6 2/9

90/28 - 56/9 is -379/126.

Find the least common denominator or LCM of the two denominators:
LCM of 28 and 9 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 28 × 9 = 252,
90/28 = 90 × 9/28 × 9 = 810/252
Likewise, for the 2nd fraction, since 9 × 28 = 252,
56/9 = 56 × 28/9 × 28 = 1568/252
Subtract the two like fractions:
810/252 - 1568/252 = 810 - 1568/252 = -758/252
After reducing the fraction, the answer is -379/126

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