Subtract 80/54 from 30/84, Solve 30/84

Subtract 80/54 from 30/84

1^st number: 30/84, 2^nd number: 1 26/54

30/84 - 80/54 is -425/378.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 54 is 756

Next, find the equivalent fraction of both fractional numbers with denominator 756
For the 1st fraction, since 84 × 9 = 756,
30/84 = 30 × 9/84 × 9 = 270/756
Likewise, for the 2nd fraction, since 54 × 14 = 756,
80/54 = 80 × 14/54 × 14 = 1120/756
Subtract the two like fractions:
270/756 - 1120/756 = 270 - 1120/756 = -850/756
After reducing the fraction, the answer is -425/378

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