Subtract 21/27 from 7/45
7/45 - 21/27 is -28/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 45 × 3 = 135,
7/45 = 7 × 3/45 × 3 = 21/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
21/27 = 21 × 5/27 × 5 = 105/135 - Subtract the two like fractions:
21/135 - 105/135 = 21 - 105/135 = -84/135 - After reducing the fraction, the answer is -28/45
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