Subtract 30/9 from 2/84, Solve 2/84

Subtract 30/9 from 2/84

1^st number: 2/84, 2^nd number: 3 3/9

2/84 - 30/9 is -139/42.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 9 is 252

Next, find the equivalent fraction of both fractional numbers with denominator 252
For the 1st fraction, since 84 × 3 = 252,
2/84 = 2 × 3/84 × 3 = 6/252
Likewise, for the 2nd fraction, since 9 × 28 = 252,
30/9 = 30 × 28/9 × 28 = 840/252
Subtract the two like fractions:
6/252 - 840/252 = 6 - 840/252 = -834/252
After reducing the fraction, the answer is -139/42

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