Subtract 10/80 from 2/20
2/20 - 10/80 is -1/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
2/20 = 2 × 4/20 × 4 = 8/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
10/80 = 10 × 1/80 × 1 = 10/80 - Subtract the two like fractions:
8/80 - 10/80 = 8 - 10/80 = -2/80 - After reducing the fraction, the answer is -1/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/20-10/80 2/20-20/80 2/40-10/80 6/20-10/80 2/20-30/80 2/60-10/80 10/20-10/80 2/20-50/80 14/20-10/80 2/20-70/80