Add 42/20 and 18/36
1st number: 2 2/20, 2nd number: 18/36
42/20 + 18/36 is 13/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
42/20 = 42 × 9/20 × 9 = 378/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
18/36 = 18 × 5/36 × 5 = 90/180 - Add the two like fractions:
378/180 + 90/180 = 378 + 90/180 = 468/180 - 468/180 simplified gives 13/5
- So, 42/20 + 18/36 = 13/5
In mixed form: 23/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+18/36 42/40+18/36 42/20+18/72 42/20+54/36 42/60+18/36 42/20+90/36