Add 42/18 and 72/36
1st number: 2 6/18, 2nd number: 2 0/36
42/18 + 72/36 is 13/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 36 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 18 × 2 = 36,
42/18 = 42 × 2/18 × 2 = 84/36 - Likewise, for the 2nd fraction, since 36 × 1 = 36,
72/36 = 72 × 1/36 × 1 = 72/36 - Add the two like fractions:
84/36 + 72/36 = 84 + 72/36 = 156/36 - 156/36 simplified gives 13/3
- So, 42/18 + 72/36 = 13/3
In mixed form: 41/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18+72/36 42/36+72/36 42/54+72/36 42/90+72/36