Add 72/42 and 4/18
1st number: 1 30/42, 2nd number: 4/18
72/42 + 4/18 is 122/63.
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,
4/18 = 4 × 7/18 × 7 = 28/126 - Add the two like fractions:
216/126 + 28/126 = 216 + 28/126 = 244/126 - 244/126 simplified gives 122/63
- So, 72/42 + 4/18 = 122/63
In mixed form: 159/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/42+8/18 72/84+4/18 72/42+4/36 72/42+12/18 72/42+4/54 72/42+20/18 72/42+4/90 72/42+28/18