Subtract 30/81 from 4/84
4/84 - 30/81 is -61/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 84 × 27 = 2268,
4/84 = 4 × 27/84 × 27 = 108/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
30/81 = 30 × 28/81 × 28 = 840/2268 - Subtract the two like fractions:
108/2268 - 840/2268 = 108 - 840/2268 = -732/2268 - After reducing the fraction, the answer is -61/189
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