Subtract 84/45 from 1/84, Solve 1/84

Subtract 84/45 from 1/84

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

1/84 - 84/45 is -779/420.

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,
1/84 = 1 × 15/84 × 15 = 15/1260
Likewise, for the 2nd fraction, since 45 × 28 = 1260,
84/45 = 84 × 28/45 × 28 = 2352/1260
Subtract the two like fractions:
15/1260 - 2352/1260 = 15 - 2352/1260 = -2337/1260
After reducing the fraction, the answer is -779/420

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