Add 2/18 and 8/21
2/18 + 8/21 is 31/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 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 21 × 6 = 126,
8/21 = 8 × 6/21 × 6 = 48/126 - Add the two like fractions:
14/126 + 48/126 = 14 + 48/126 = 62/126 - 62/126 simplified gives 31/63
- So, 2/18 + 8/21 = 31/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/18+8/21 2/18+16/21 2/36+8/21 2/18+8/42 6/18+8/21 2/18+24/21 2/54+8/21 2/18+8/63 10/18+8/21 2/18+40/21 2/90+8/21 14/18+8/21 2/18+56/21