Add 2/18 and 21/42
2/18 + 21/42 is 11/18.
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,
2/18 = 2 × 7/18 × 7 = 14/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
21/42 = 21 × 3/42 × 3 = 63/126 - Add the two like fractions:
14/126 + 63/126 = 14 + 63/126 = 77/126 - 77/126 simplified gives 11/18
- So, 2/18 + 21/42 = 11/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/18+21/42 2/36+21/42 2/18+21/84 6/18+21/42 2/18+63/42 2/54+21/42 10/18+21/42 2/90+21/42 14/18+21/42