Add 42/18 and 12/20
1st number: 2 6/18, 2nd number: 12/20
42/18 + 12/20 is 44/15.
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,
12/20 = 12 × 9/20 × 9 = 108/180 - Add the two like fractions:
420/180 + 108/180 = 420 + 108/180 = 528/180 - 528/180 simplified gives 44/15
- So, 42/18 + 12/20 = 44/15
In mixed form: 214/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+12/20 42/18+24/20 42/36+12/20 42/18+12/40 42/18+36/20 42/54+12/20 42/18+12/60 42/18+60/20 42/90+12/20 42/18+84/20