Add 30/18 and 8/42
1st number: 1 12/18, 2nd number: 8/42
30/18 + 8/42 is 13/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
30/18 = 30 × 7/18 × 7 = 210/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
8/42 = 8 × 3/42 × 3 = 24/126 - Add the two like fractions:
210/126 + 24/126 = 210 + 24/126 = 234/126 - 234/126 simplified gives 13/7
- So, 30/18 + 8/42 = 13/7
In mixed form: 16/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18+8/42 30/18+16/42 30/36+8/42 30/18+8/84 90/18+8/42 30/18+24/42 30/54+8/42 30/18+40/42 30/90+8/42 30/18+56/42