Subtract 84/45 from 4/84, Solve 4/84

Subtract 84/45 from 4/84

1^st number: 4/84, 2^nd number: 1 39/45

4/84 - 84/45 is -191/105.

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

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 84 × 15 = 1260,
4/84 = 4 × 15/84 × 15 = 60/1260
Likewise, for the 2nd fraction, since 45 × 28 = 1260,
84/45 = 84 × 28/45 × 28 = 2352/1260
Subtract the two like fractions:
60/1260 - 2352/1260 = 60 - 2352/1260 = -2292/1260
After reducing the fraction, the answer is -191/105

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