Add 28/15 and 75/40
1st number: 1 13/15, 2nd number: 1 35/40
28/15 + 75/40 is 449/120.
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,
28/15 = 28 × 8/15 × 8 = 224/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
75/40 = 75 × 3/40 × 3 = 225/120 - Add the two like fractions:
224/120 + 225/120 = 224 + 225/120 = 449/120 - So, 28/15 + 75/40 = 449/120
In mixed form: 389/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/15+75/40 28/30+75/40 28/15+75/80 84/15+75/40 28/45+75/40 28/75+75/40