Subtract 80/18 from 42/28
1st number: 1 14/28, 2nd number: 4 8/18
42/28 - 80/18 is -53/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 18 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
42/28 = 42 × 9/28 × 9 = 378/252 - Likewise, for the 2nd fraction, since 18 × 14 = 252,
80/18 = 80 × 14/18 × 14 = 1120/252 - Subtract the two like fractions:
378/252 - 1120/252 = 378 - 1120/252 = -742/252 - After reducing the fraction, the answer is -53/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/28-80/18 42/56-80/18 42/28-80/36 42/84-80/18 42/28-80/54 42/28-80/90