Add 7/18 and 20/42
7/18 + 20/42 is 109/126.
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,
7/18 = 7 × 7/18 × 7 = 49/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
20/42 = 20 × 3/42 × 3 = 60/126 - Add the two like fractions:
49/126 + 60/126 = 49 + 60/126 = 109/126 - So, 7/18 + 20/42 = 109/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/18+20/42 7/18+40/42 7/36+20/42 7/18+20/84 21/18+20/42 7/18+60/42 7/54+20/42 35/18+20/42 7/90+20/42 49/18+20/42