Add 28/81 and 60/15
1st number: 28/81, 2nd number: 4 0/15
28/81 + 60/15 is 352/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 15 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 81 × 5 = 405,
28/81 = 28 × 5/81 × 5 = 140/405 - Likewise, for the 2nd fraction, since 15 × 27 = 405,
60/15 = 60 × 27/15 × 27 = 1620/405 - Add the two like fractions:
140/405 + 1620/405 = 140 + 1620/405 = 1760/405 - 1760/405 simplified gives 352/81
- So, 28/81 + 60/15 = 352/81
In mixed form: 428/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/81+60/15 28/81+60/30 84/81+60/15 28/81+60/45 28/81+60/75