Add 25/49 and 70/81
25/49 + 70/81 is 5455/3969.
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,
25/49 = 25 × 81/49 × 81 = 2025/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
70/81 = 70 × 49/81 × 49 = 3430/3969 - Add the two like fractions:
2025/3969 + 3430/3969 = 2025 + 3430/3969 = 5455/3969 - So, 25/49 + 70/81 = 5455/3969
In mixed form: 11486/3969
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/49+70/81 25/98+70/81 75/49+70/81