Subtract 42/27 from 3/18
1st number: 3/18, 2nd number: 1 15/27
3/18 - 42/27 is -25/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 27 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 18 × 3 = 54,
3/18 = 3 × 3/18 × 3 = 9/54 - Likewise, for the 2nd fraction, since 27 × 2 = 54,
42/27 = 42 × 2/27 × 2 = 84/54 - Subtract the two like fractions:
9/54 - 84/54 = 9 - 84/54 = -75/54 - After reducing the fraction, the answer is -25/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18-42/27 3/18-84/27 3/36-42/27 3/18-42/54 9/18-42/27 3/54-42/27 3/18-42/81 15/18-42/27 3/90-42/27 21/18-42/27