Add 3/18 and 16/21
3/18 + 16/21 is 13/14.
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,
16/21 = 16 × 6/21 × 6 = 96/126 - Add the two like fractions:
21/126 + 96/126 = 21 + 96/126 = 117/126 - 117/126 simplified gives 13/14
- So, 3/18 + 16/21 = 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18+16/21 3/18+32/21 3/36+16/21 3/18+16/42 9/18+16/21 3/18+48/21 3/54+16/21 3/18+16/63 15/18+16/21 3/18+80/21 3/90+16/21 21/18+16/21