Subtract 81/20 from 4/2
1st number: 2 0/2, 2nd number: 4 1/20
4/2 - 81/20 is -41/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 2 × 10 = 20,
4/2 = 4 × 10/2 × 10 = 40/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
81/20 = 81 × 1/20 × 1 = 81/20 - Subtract the two like fractions:
40/20 - 81/20 = 40 - 81/20 = -41/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/2-81/20 4/2-81/40 12/2-81/20 4/6-81/20 4/2-81/60 20/2-81/20 4/10-81/20 28/2-81/20 4/14-81/20