Add 6/20 and 90/81
1st number: 6/20, 2nd number: 1 9/81
6/20 + 90/81 is 127/90.
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,
90/81 = 90 × 20/81 × 20 = 1800/1620 - Add the two like fractions:
486/1620 + 1800/1620 = 486 + 1800/1620 = 2286/1620 - 2286/1620 simplified gives 127/90
- So, 6/20 + 90/81 = 127/90
In mixed form: 137/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/20+90/81 6/40+90/81 18/20+90/81 6/60+90/81 30/20+90/81 42/20+90/81