Subtract 28/35 from 15/81
15/81 - 28/35 is -83/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 35 is 2835
Next, find the equivalent fraction of both fractional numbers with denominator 2835 - For the 1st fraction, since 81 × 35 = 2835,
15/81 = 15 × 35/81 × 35 = 525/2835 - Likewise, for the 2nd fraction, since 35 × 81 = 2835,
28/35 = 28 × 81/35 × 81 = 2268/2835 - Subtract the two like fractions:
525/2835 - 2268/2835 = 525 - 2268/2835 = -1743/2835 - After reducing the fraction, the answer is -83/135
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