Subtract 10/20 from 4/80
4/80 - 10/20 is -9/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
4/80 = 4 × 1/80 × 1 = 4/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
10/20 = 10 × 4/20 × 4 = 40/80 - Subtract the two like fractions:
4/80 - 40/80 = 4 - 40/80 = -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: 8/80-10/20 4/80-10/40 12/80-10/20 4/80-30/20 4/80-10/60 20/80-10/20 4/80-50/20 28/80-10/20 4/80-70/20