Add 6/20 and 15/81
6/20 + 15/81 is 131/270.
Steps for adding 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,
6/20 = 6 × 81/20 × 81 = 486/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
15/81 = 15 × 20/81 × 20 = 300/1620 - Add the two like fractions:
486/1620 + 300/1620 = 486 + 300/1620 = 786/1620 - 786/1620 simplified gives 131/270
- So, 6/20 + 15/81 = 131/270
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/20+15/81 6/20+30/81 6/40+15/81 18/20+15/81 6/20+45/81 6/60+15/81 30/20+15/81 6/20+75/81 42/20+15/81