Subtract 28/18 from 42/50
1st number: 42/50, 2nd number: 1 10/18
42/50 - 28/18 is -161/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 50 × 9 = 450,
42/50 = 42 × 9/50 × 9 = 378/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
28/18 = 28 × 25/18 × 25 = 700/450 - Subtract the two like fractions:
378/450 - 700/450 = 378 - 700/450 = -322/450 - After reducing the fraction, the answer is -161/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/50-28/18 42/50-56/18 42/50-28/36 42/50-84/18 42/50-28/54 42/50-28/90