Add 45/12 and 70/81
1st number: 3 9/12, 2nd number: 70/81
45/12 + 70/81 is 1495/324.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 81 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 12 × 27 = 324,
45/12 = 45 × 27/12 × 27 = 1215/324 - Likewise, for the 2nd fraction, since 81 × 4 = 324,
70/81 = 70 × 4/81 × 4 = 280/324 - Add the two like fractions:
1215/324 + 280/324 = 1215 + 280/324 = 1495/324 - So, 45/12 + 70/81 = 1495/324
In mixed form: 4199/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+70/81 45/24+70/81 45/36+70/81 45/60+70/81 45/84+70/81