Subtract 27/42 from 27/15
1st number: 1 12/15, 2nd number: 27/42
27/15 - 27/42 is 81/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
27/15 = 27 × 14/15 × 14 = 378/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
27/42 = 27 × 5/42 × 5 = 135/210 - Subtract the two like fractions:
378/210 - 135/210 = 378 - 135/210 = 243/210 - After reducing the fraction, the answer is 81/70
- In mixed form: 111/70
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