Add 56/21 and 80/18
1st number: 2 14/21, 2nd number: 4 8/18
56/21 + 80/18 is 64/9.
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,
56/21 = 56 × 6/21 × 6 = 336/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
80/18 = 80 × 7/18 × 7 = 560/126 - Add the two like fractions:
336/126 + 560/126 = 336 + 560/126 = 896/126 - 896/126 simplified gives 64/9
- So, 56/21 + 80/18 = 64/9
In mixed form: 71/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42+80/18 56/21+80/36 56/63+80/18 56/21+80/54 56/21+80/90