Add 10/18 and 72/80
10/18 + 72/80 is 131/90.
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,
10/18 = 10 × 40/18 × 40 = 400/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
72/80 = 72 × 9/80 × 9 = 648/720 - Add the two like fractions:
400/720 + 648/720 = 400 + 648/720 = 1048/720 - 1048/720 simplified gives 131/90
- So, 10/18 + 72/80 = 131/90
In mixed form: 141/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/18+72/80 10/36+72/80 30/18+72/80 10/54+72/80 50/18+72/80 10/90+72/80 70/18+72/80