Subtract 28/90 from 3/10
3/10 - 28/90 is -1/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
3/10 = 3 × 9/10 × 9 = 27/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
28/90 = 28 × 1/90 × 1 = 28/90 - Subtract the two like fractions:
27/90 - 28/90 = 27 - 28/90 = -1/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/10-28/90 3/10-56/90 3/20-28/90 9/10-28/90 3/10-84/90 3/30-28/90 15/10-28/90 3/50-28/90 21/10-28/90 3/70-28/90