Add 30/42 and 10/18
30/42 + 10/18 is 80/63.
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,
30/42 = 30 × 3/42 × 3 = 90/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
10/18 = 10 × 7/18 × 7 = 70/126 - Add the two like fractions:
90/126 + 70/126 = 90 + 70/126 = 160/126 - 160/126 simplified gives 80/63
- So, 30/42 + 10/18 = 80/63
In mixed form: 117/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42+10/18 30/42+20/18 30/84+10/18 30/42+10/36 90/42+10/18 30/42+30/18 30/42+10/54 30/42+50/18 30/42+10/90 30/42+70/18