Subtract 49/30 from 28/18
1st number: 1 10/18, 2nd number: 1 19/30
28/18 - 49/30 is -7/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
28/18 = 28 × 5/18 × 5 = 140/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
49/30 = 49 × 3/30 × 3 = 147/90 - Subtract the two like fractions:
140/90 - 147/90 = 140 - 147/90 = -7/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18-49/30 28/18-98/30 28/36-49/30 28/18-49/60 84/18-49/30 28/54-49/30 28/18-49/90 28/90-49/30