Add 10/18 and 3/21
10/18 + 3/21 is 44/63.
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,
10/18 = 10 × 7/18 × 7 = 70/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
3/21 = 3 × 6/21 × 6 = 18/126 - Add the two like fractions:
70/126 + 18/126 = 70 + 18/126 = 88/126 - 88/126 simplified gives 44/63
- So, 10/18 + 3/21 = 44/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/18+3/21 10/18+6/21 10/36+3/21 10/18+3/42 30/18+3/21 10/18+9/21 10/54+3/21 10/18+3/63 50/18+3/21 10/18+15/21 10/90+3/21 70/18+3/21