Subtract 28/80 from 8/10
8/10 - 28/80 is 9/20.
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,
8/10 = 8 × 8/10 × 8 = 64/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
28/80 = 28 × 1/80 × 1 = 28/80 - Subtract the two like fractions:
64/80 - 28/80 = 64 - 28/80 = 36/80 - After reducing the fraction, the answer is 9/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10-28/80 8/10-56/80 8/20-28/80 24/10-28/80 8/10-84/80 8/30-28/80 40/10-28/80 8/50-28/80 56/10-28/80 8/70-28/80