Subtract 4/81 from 2/20
2/20 - 4/81 is 41/810.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 81 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 20 × 81 = 1620,
2/20 = 2 × 81/20 × 81 = 162/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
4/81 = 4 × 20/81 × 20 = 80/1620 - Subtract the two like fractions:
162/1620 - 80/1620 = 162 - 80/1620 = 82/1620 - After reducing the fraction, the answer is 41/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/20-4/81 2/20-8/81 2/40-4/81 6/20-4/81 2/20-12/81 2/60-4/81 10/20-4/81 2/20-20/81 14/20-4/81 2/20-28/81