Add 3/18 and 50/21
1st number: 3/18, 2nd number: 2 8/21
3/18 + 50/21 is 107/42.
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,
50/21 = 50 × 6/21 × 6 = 300/126 - Add the two like fractions:
21/126 + 300/126 = 21 + 300/126 = 321/126 - 321/126 simplified gives 107/42
- So, 3/18 + 50/21 = 107/42
In mixed form: 223/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/18+50/21 3/36+50/21 3/18+50/42 9/18+50/21 3/54+50/21 3/18+50/63 15/18+50/21 3/90+50/21 21/18+50/21