Subtract 10/90 from 28/12
1st number: 2 4/12, 2nd number: 10/90
28/12 - 10/90 is 20/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
28/12 = 28 × 15/12 × 15 = 420/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
10/90 = 10 × 2/90 × 2 = 20/180 - Subtract the two like fractions:
420/180 - 20/180 = 420 - 20/180 = 400/180 - After reducing the fraction, the answer is 20/9
- In mixed form: 22/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12-10/90 28/12-20/90 28/24-10/90 84/12-10/90 28/12-30/90 28/36-10/90 28/12-50/90 28/60-10/90 28/12-70/90 28/84-10/90