Subtract 84/54 from 2/7, Solve 2/7 - 1 30/54 as a fraction

Subtract 84/54 from 2/7

1^st number: 2/7, 2^nd number: 1 30/54

2/7 - 84/54 is -80/63.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 54 is 378

Next, find the equivalent fraction of both fractional numbers with denominator 378
For the 1st fraction, since 7 × 54 = 378,
2/7 = 2 × 54/7 × 54 = 108/378
Likewise, for the 2nd fraction, since 54 × 7 = 378,
84/54 = 84 × 7/54 × 7 = 588/378
Subtract the two like fractions:
108/378 - 588/378 = 108 - 588/378 = -480/378
After reducing the fraction, the answer is -80/63

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