Subtract 28/30 from 1/27
1/27 - 28/30 is -121/135.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 27 and 30 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 27 × 10 = 270,
1/27 = 1 × 10/27 × 10 = 10/270 - Likewise, for the 2nd fraction, since 30 × 9 = 270,
28/30 = 28 × 9/30 × 9 = 252/270 - Subtract the two like fractions:
10/270 - 252/270 = 10 - 252/270 = -242/270 - After reducing the fraction, the answer is -121/135
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