Add 28/2 and 21/45
1st number: 14 0/2, 2nd number: 21/45
28/2 + 21/45 is 217/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 2 × 45 = 90,
28/2 = 28 × 45/2 × 45 = 1260/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
21/45 = 21 × 2/45 × 2 = 42/90 - Add the two like fractions:
1260/90 + 42/90 = 1260 + 42/90 = 1302/90 - 1302/90 simplified gives 217/15
- So, 28/2 + 21/45 = 217/15
In mixed form: 147/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/2+21/45 28/2+42/45 28/4+21/45 28/2+21/90 84/2+21/45 28/2+63/45 28/6+21/45 28/10+21/45 28/14+21/45