Add 42/18 and 5/20
1st number: 2 6/18, 2nd number: 5/20
42/18 + 5/20 is 31/12.
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,
5/20 = 5 × 9/20 × 9 = 45/180 - Add the two like fractions:
420/180 + 45/180 = 420 + 45/180 = 465/180 - 465/180 simplified gives 31/12
- So, 42/18 + 5/20 = 31/12
In mixed form: 27/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+5/20 42/18+10/20 42/36+5/20 42/18+5/40 42/18+15/20 42/54+5/20 42/18+5/60 42/18+25/20 42/90+5/20 42/18+35/20