Subtract 28/12 from 25/90
1st number: 25/90, 2nd number: 2 4/12
25/90 - 28/12 is -37/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
25/90 = 25 × 2/90 × 2 = 50/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
28/12 = 28 × 15/12 × 15 = 420/180 - Subtract the two like fractions:
50/180 - 420/180 = 50 - 420/180 = -370/180 - After reducing the fraction, the answer is -37/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/90-28/12 25/90-56/12 25/90-28/24 75/90-28/12 25/90-84/12 25/90-28/36 25/90-28/60 25/90-28/84