Add 20/49 and 30/81
20/49 + 30/81 is 1030/1323.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 81 is 3969
Next, find the equivalent fraction of both fractional numbers with denominator 3969 - For the 1st fraction, since 49 × 81 = 3969,
20/49 = 20 × 81/49 × 81 = 1620/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
30/81 = 30 × 49/81 × 49 = 1470/3969 - Add the two like fractions:
1620/3969 + 1470/3969 = 1620 + 1470/3969 = 3090/3969 - 3090/3969 simplified gives 1030/1323
- So, 20/49 + 30/81 = 1030/1323
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/49+30/81 20/49+60/81 20/98+30/81 60/49+30/81 20/49+90/81