Add 50/21 and 70/18
1st number: 2 8/21, 2nd number: 3 16/18
50/21 + 70/18 is 395/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
50/21 = 50 × 6/21 × 6 = 300/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126 - Add the two like fractions:
300/126 + 490/126 = 300 + 490/126 = 790/126 - 790/126 simplified gives 395/63
- So, 50/21 + 70/18 = 395/63
In mixed form: 617/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42+70/18 50/21+70/36 50/63+70/18 50/21+70/54 50/21+70/90