Add 28/16 and 15/90
1st number: 1 12/16, 2nd number: 15/90
28/16 + 15/90 is 23/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 16 × 45 = 720,
28/16 = 28 × 45/16 × 45 = 1260/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
15/90 = 15 × 8/90 × 8 = 120/720 - Add the two like fractions:
1260/720 + 120/720 = 1260 + 120/720 = 1380/720 - 1380/720 simplified gives 23/12
- So, 28/16 + 15/90 = 23/12
In mixed form: 111/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/16+15/90 28/16+30/90 28/32+15/90 84/16+15/90 28/16+45/90 28/48+15/90 28/16+75/90 28/80+15/90