Subtract 15/81 from 30/84
30/84 - 15/81 is 65/378.
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,
30/84 = 30 × 27/84 × 27 = 810/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
15/81 = 15 × 28/81 × 28 = 420/2268 - Subtract the two like fractions:
810/2268 - 420/2268 = 810 - 420/2268 = 390/2268 - After reducing the fraction, the answer is 65/378
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