Subtract 49/36 from 28/90
1st number: 28/90, 2nd number: 1 13/36
28/90 - 49/36 is -21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
28/90 = 28 × 2/90 × 2 = 56/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
49/36 = 49 × 5/36 × 5 = 245/180 - Subtract the two like fractions:
56/180 - 245/180 = 56 - 245/180 = -189/180 - After reducing the fraction, the answer is -21/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90-49/36 28/90-98/36 28/90-49/72 84/90-49/36