Add 72/42 and 3/18
1st number: 1 30/42, 2nd number: 3/18
72/42 + 3/18 is 79/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
72/42 = 72 × 3/42 × 3 = 216/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
3/18 = 3 × 7/18 × 7 = 21/126 - Add the two like fractions:
216/126 + 21/126 = 216 + 21/126 = 237/126 - 237/126 simplified gives 79/42
- So, 72/42 + 3/18 = 79/42
In mixed form: 137/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+6/18 72/84+3/18 72/42+3/36 72/42+9/18 72/42+3/54 72/42+15/18 72/42+3/90 72/42+21/18