Subtract 28/80 from 9/10
9/10 - 28/80 is 11/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 10 × 8 = 80,
9/10 = 9 × 8/10 × 8 = 72/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
28/80 = 28 × 1/80 × 1 = 28/80 - Subtract the two like fractions:
72/80 - 28/80 = 72 - 28/80 = 44/80 - After reducing the fraction, the answer is 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10-28/80 9/10-56/80 9/20-28/80 27/10-28/80 9/10-84/80 9/30-28/80 45/10-28/80 9/50-28/80 63/10-28/80 9/70-28/80