Add 28/18 and 75/80
1st number: 1 10/18, 2nd number: 75/80
28/18 + 75/80 is 359/144.
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,
75/80 = 75 × 9/80 × 9 = 675/720 - Add the two like fractions:
1120/720 + 675/720 = 1120 + 675/720 = 1795/720 - 1795/720 simplified gives 359/144
- So, 28/18 + 75/80 = 359/144
In mixed form: 271/144
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18+75/80 28/36+75/80 84/18+75/80 28/54+75/80 28/90+75/80