Add 3/18 and 10/21
3/18 + 10/21 is 9/14.
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,
3/18 = 3 × 7/18 × 7 = 21/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
10/21 = 10 × 6/21 × 6 = 60/126 - Add the two like fractions:
21/126 + 60/126 = 21 + 60/126 = 81/126 - 81/126 simplified gives 9/14
- So, 3/18 + 10/21 = 9/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18+10/21 3/18+20/21 3/36+10/21 3/18+10/42 9/18+10/21 3/18+30/21 3/54+10/21 3/18+10/63 15/18+10/21 3/18+50/21 3/90+10/21 21/18+10/21 3/18+70/21