Add 2/21 and 4/18
2/21 + 4/18 is 20/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
2/21 = 2 × 6/21 × 6 = 12/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
4/18 = 4 × 7/18 × 7 = 28/126 - Add the two like fractions:
12/126 + 28/126 = 12 + 28/126 = 40/126 - 40/126 simplified gives 20/63
- So, 2/21 + 4/18 = 20/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21+4/18 2/21+8/18 2/42+4/18 2/21+4/36 6/21+4/18 2/21+12/18 2/63+4/18 2/21+4/54 10/21+4/18 2/21+20/18 2/21+4/90 14/21+4/18 2/21+28/18