Add 90/72 and 3/80
1st number: 1 18/72, 2nd number: 3/80
90/72 + 3/80 is 103/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 72 × 10 = 720,
90/72 = 90 × 10/72 × 10 = 900/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
3/80 = 3 × 9/80 × 9 = 27/720 - Add the two like fractions:
900/720 + 27/720 = 900 + 27/720 = 927/720 - 927/720 simplified gives 103/80
- So, 90/72 + 3/80 = 103/80
In mixed form: 123/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/72+6/80 90/72+9/80 90/72+15/80 90/72+21/80