Subtract 70/15 from 28/90
1st number: 28/90, 2nd number: 4 10/15
28/90 - 70/15 is -196/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 15 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
28/90 = 28 × 1/90 × 1 = 28/90 - Likewise, for the 2nd fraction, since 15 × 6 = 90,
70/15 = 70 × 6/15 × 6 = 420/90 - Subtract the two like fractions:
28/90 - 420/90 = 28 - 420/90 = -392/90 - After reducing the fraction, the answer is -196/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90-70/15 28/90-70/30 84/90-70/15 28/90-70/45 28/90-70/75