Subtract 42/18 from 27/5
1st number: 5 2/5, 2nd number: 2 6/18
27/5 - 42/18 is 46/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
27/5 = 27 × 18/5 × 18 = 486/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
42/18 = 42 × 5/18 × 5 = 210/90 - Subtract the two like fractions:
486/90 - 210/90 = 486 - 210/90 = 276/90 - After reducing the fraction, the answer is 46/15
- In mixed form: 31/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/5-42/18 27/5-84/18 27/10-42/18 27/5-42/36 81/5-42/18 27/15-42/18 27/5-42/54 27/25-42/18 27/5-42/90 27/35-42/18