Add 80/21 and 40/18
1st number: 3 17/21, 2nd number: 2 4/18
80/21 + 40/18 is 380/63.
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,
80/21 = 80 × 6/21 × 6 = 480/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
40/18 = 40 × 7/18 × 7 = 280/126 - Add the two like fractions:
480/126 + 280/126 = 480 + 280/126 = 760/126 - 760/126 simplified gives 380/63
- So, 80/21 + 40/18 = 380/63
In mixed form: 62/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+80/18 80/42+40/18 80/21+40/36 80/63+40/18 80/21+40/54 80/21+40/90