Add 1/81 and 49/20
1st number: 1/81, 2nd number: 2 9/20
1/81 + 49/20 is 3989/1620.
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,
1/81 = 1 × 20/81 × 20 = 20/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
49/20 = 49 × 81/20 × 81 = 3969/1620 - Add the two like fractions:
20/1620 + 3969/1620 = 20 + 3969/1620 = 3989/1620 - So, 1/81 + 49/20 = 3989/1620
In mixed form: 2749/1620
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/81+49/20 1/81+98/20 1/81+49/40 3/81+49/20 1/81+49/60 5/81+49/20 7/81+49/20