Subtract 3/27 from 90/84, Solve 1 6/84

Subtract 3/27 from 90/84

1^st number: 1 6/84, 2^nd number: 3/27

90/84 - 3/27 is 121/126.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 27 is 756

Next, find the equivalent fraction of both fractional numbers with denominator 756
For the 1st fraction, since 84 × 9 = 756,
90/84 = 90 × 9/84 × 9 = 810/756
Likewise, for the 2nd fraction, since 27 × 28 = 756,
3/27 = 3 × 28/27 × 28 = 84/756
Subtract the two like fractions:
810/756 - 84/756 = 810 - 84/756 = 726/756
After reducing the fraction, the answer is 121/126

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