Add 28/18 and 4/80
1st number: 1 10/18, 2nd number: 4/80
28/18 + 4/80 is 289/180.
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,
28/18 = 28 × 40/18 × 40 = 1120/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
4/80 = 4 × 9/80 × 9 = 36/720 - Add the two like fractions:
1120/720 + 36/720 = 1120 + 36/720 = 1156/720 - 1156/720 simplified gives 289/180
- So, 28/18 + 4/80 = 289/180
In mixed form: 1109/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+4/80 28/18+8/80 28/36+4/80 84/18+4/80 28/18+12/80 28/54+4/80 28/18+20/80 28/90+4/80 28/18+28/80