Subtract 5/10 from 20/80
20/80 - 5/10 is -1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 10 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
20/80 = 20 × 1/80 × 1 = 20/80 - Likewise, for the 2nd fraction, since 10 × 8 = 80,
5/10 = 5 × 8/10 × 8 = 40/80 - Subtract the two like fractions:
20/80 - 40/80 = 20 - 40/80 = -20/80 - After reducing the fraction, the answer is -1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/80-5/10 20/80-5/20 60/80-5/10 20/80-15/10 20/80-5/30 20/80-25/10 20/80-5/50 20/80-35/10 20/80-5/70