Subtract 2/90 from 28/15
1st number: 1 13/15, 2nd number: 2/90
28/15 - 2/90 is 83/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
28/15 = 28 × 6/15 × 6 = 168/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
2/90 = 2 × 1/90 × 1 = 2/90 - Subtract the two like fractions:
168/90 - 2/90 = 168 - 2/90 = 166/90 - After reducing the fraction, the answer is 83/45
- In mixed form: 138/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/15-2/90 28/15-4/90 28/30-2/90 84/15-2/90 28/15-6/90 28/45-2/90 28/15-10/90 28/75-2/90 28/15-14/90