Add 84/15 and 15/40
1st number: 5 9/15, 2nd number: 15/40
84/15 + 15/40 is 239/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
84/15 = 84 × 8/15 × 8 = 672/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
15/40 = 15 × 3/40 × 3 = 45/120 - Add the two like fractions:
672/120 + 45/120 = 672 + 45/120 = 717/120 - 717/120 simplified gives 239/40
- So, 84/15 + 15/40 = 239/40
In mixed form: 539/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15+30/40 84/30+15/40 84/15+15/80 84/15+45/40 84/45+15/40 84/15+75/40 84/75+15/40