Add 49/20 and 20/81
1st number: 2 9/20, 2nd number: 20/81
49/20 + 20/81 is 4369/1620.
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,
49/20 = 49 × 81/20 × 81 = 3969/1620 - Likewise, for the 2nd fraction, since 81 × 20 = 1620,
20/81 = 20 × 20/81 × 20 = 400/1620 - Add the two like fractions:
3969/1620 + 400/1620 = 3969 + 400/1620 = 4369/1620 - So, 49/20 + 20/81 = 4369/1620
In mixed form: 21129/1620
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/20+20/81 49/20+40/81 49/40+20/81 49/20+60/81 49/60+20/81