Subtract 42/28 from 3/18
1st number: 3/18, 2nd number: 1 14/28
3/18 - 42/28 is -4/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
3/18 = 3 × 14/18 × 14 = 42/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
42/28 = 42 × 9/28 × 9 = 378/252 - Subtract the two like fractions:
42/252 - 378/252 = 42 - 378/252 = -336/252 - After reducing the fraction, the answer is -4/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18-42/28 3/18-84/28 3/36-42/28 3/18-42/56 9/18-42/28 3/54-42/28 3/18-42/84 15/18-42/28 3/90-42/28 21/18-42/28