Add 18/80 and 42/18
1st number: 18/80, 2nd number: 2 6/18
18/80 + 42/18 is 307/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
18/80 = 18 × 9/80 × 9 = 162/720 - Likewise, for the 2nd fraction, since 18 × 40 = 720,
42/18 = 42 × 40/18 × 40 = 1680/720 - Add the two like fractions:
162/720 + 1680/720 = 162 + 1680/720 = 1842/720 - 1842/720 simplified gives 307/120
- So, 18/80 + 42/18 = 307/120
In mixed form: 267/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/80+42/18 18/80+84/18 18/80+42/36 54/80+42/18 18/80+42/54 90/80+42/18 18/80+42/90