Add 4/18 and 9/21
4/18 + 9/21 is 41/63.
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,
4/18 = 4 × 7/18 × 7 = 28/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
9/21 = 9 × 6/21 × 6 = 54/126 - Add the two like fractions:
28/126 + 54/126 = 28 + 54/126 = 82/126 - 82/126 simplified gives 41/63
- So, 4/18 + 9/21 = 41/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/18+9/21 4/18+18/21 4/36+9/21 4/18+9/42 12/18+9/21 4/18+27/21 4/54+9/21 4/18+9/63 20/18+9/21 4/18+45/21 4/90+9/21 28/18+9/21 4/18+63/21