Add 80/81 and 27/20
1st number: 80/81, 2nd number: 1 7/20
80/81 + 27/20 is 3787/1620.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 20 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
80/81 = 80 × 20/81 × 20 = 1600/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
27/20 = 27 × 81/20 × 81 = 2187/1620 - Add the two like fractions:
1600/1620 + 2187/1620 = 1600 + 2187/1620 = 3787/1620 - So, 80/81 + 27/20 = 3787/1620
In mixed form: 2547/1620
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/81+54/20 80/81+27/40 80/81+81/20 80/81+27/60