Add 28/20 and 45/15
1st number: 1 8/20, 2nd number: 3 0/15
28/20 + 45/15 is 22/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
28/20 = 28 × 3/20 × 3 = 84/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
45/15 = 45 × 4/15 × 4 = 180/60 - Add the two like fractions:
84/60 + 180/60 = 84 + 180/60 = 264/60 - 264/60 simplified gives 22/5
- So, 28/20 + 45/15 = 22/5
In mixed form: 42/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/20+45/15 28/20+90/15 28/40+45/15 28/20+45/30 84/20+45/15 28/60+45/15 28/20+45/75