Add 63/18 and 28/80
1st number: 3 9/18, 2nd number: 28/80
63/18 + 28/80 is 77/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
63/18 = 63 × 40/18 × 40 = 2520/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
28/80 = 28 × 9/80 × 9 = 252/720 - Add the two like fractions:
2520/720 + 252/720 = 2520 + 252/720 = 2772/720 - 2772/720 simplified gives 77/20
- So, 63/18 + 28/80 = 77/20
In mixed form: 317/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/18+56/80 63/36+28/80 63/18+84/80 63/54+28/80 63/90+28/80