Add 42/18 and 36/20
1st number: 2 6/18, 2nd number: 1 16/20
42/18 + 36/20 is 62/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
42/18 = 42 × 10/18 × 10 = 420/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
36/20 = 36 × 9/20 × 9 = 324/180 - Add the two like fractions:
420/180 + 324/180 = 420 + 324/180 = 744/180 - 744/180 simplified gives 62/15
- So, 42/18 + 36/20 = 62/15
In mixed form: 42/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+36/20 42/18+72/20 42/36+36/20 42/18+36/40 42/54+36/20 42/18+36/60 42/90+36/20