Add 84/15 and 28/18
1st number: 5 9/15, 2nd number: 1 10/18
84/15 + 28/18 is 322/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
84/15 = 84 × 6/15 × 6 = 504/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
28/18 = 28 × 5/18 × 5 = 140/90 - Add the two like fractions:
504/90 + 140/90 = 504 + 140/90 = 644/90 - 644/90 simplified gives 322/45
- So, 84/15 + 28/18 = 322/45
In mixed form: 77/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15+56/18 84/30+28/18 84/15+28/36 84/15+84/18 84/45+28/18 84/15+28/54 84/75+28/18 84/15+28/90