Add 42/18 and 18/7
1st number: 2 6/18, 2nd number: 2 4/7
42/18 + 18/7 is 103/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 7 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
42/18 = 42 × 7/18 × 7 = 294/126 - Likewise, for the 2nd fraction, since 7 × 18 = 126,
18/7 = 18 × 18/7 × 18 = 324/126 - Add the two like fractions:
294/126 + 324/126 = 294 + 324/126 = 618/126 - 618/126 simplified gives 103/21
- So, 42/18 + 18/7 = 103/21
In mixed form: 419/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+18/7 42/18+36/7 42/36+18/7 42/18+18/14 42/18+54/7 42/54+18/7 42/18+18/21 42/18+90/7 42/90+18/7 42/18+18/35 42/18+18/49