Subtract 42/27 from 20/45
1st number: 20/45, 2nd number: 1 15/27
20/45 - 42/27 is -10/9.
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,
20/45 = 20 × 3/45 × 3 = 60/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
42/27 = 42 × 5/27 × 5 = 210/135 - Subtract the two like fractions:
60/135 - 210/135 = 60 - 210/135 = -150/135 - After reducing the fraction, the answer is -10/9
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