Subtract 12/84 from 2/45, Solve 2/45

Subtract 12/84 from 2/45

2/45 - 12/84 is -31/315.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 84 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 45 × 28 = 1260,
2/45 = 2 × 28/45 × 28 = 56/1260
Likewise, for the 2nd fraction, since 84 × 15 = 1260,
12/84 = 12 × 15/84 × 15 = 180/1260
Subtract the two like fractions:
56/1260 - 180/1260 = 56 - 180/1260 = -124/1260
After reducing the fraction, the answer is -31/315

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