Add 28/5 and 45/7
1st number: 5 3/5, 2nd number: 6 3/7
28/5 + 45/7 is 421/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 7 is 35
Next, find the equivalent fraction of both fractional numbers with denominator 35 - For the 1st fraction, since 5 × 7 = 35,
28/5 = 28 × 7/5 × 7 = 196/35 - Likewise, for the 2nd fraction, since 7 × 5 = 35,
45/7 = 45 × 5/7 × 5 = 225/35 - Add the two like fractions:
196/35 + 225/35 = 196 + 225/35 = 421/35 - So, 28/5 + 45/7 = 421/35
In mixed form: 121/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/5+45/7 28/5+90/7 28/10+45/7 28/5+45/14 84/5+45/7 28/15+45/7 28/5+45/21 28/25+45/7 28/5+45/35 28/35+45/7 28/5+45/49