Add 12/21 and 40/18
1st number: 12/21, 2nd number: 2 4/18
12/21 + 40/18 is 176/63.
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,
12/21 = 12 × 6/21 × 6 = 72/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
40/18 = 40 × 7/18 × 7 = 280/126 - Add the two like fractions:
72/126 + 280/126 = 72 + 280/126 = 352/126 - 352/126 simplified gives 176/63
- So, 12/21 + 40/18 = 176/63
In mixed form: 250/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+40/18 12/21+80/18 12/42+40/18 12/21+40/36 36/21+40/18 12/63+40/18 12/21+40/54 60/21+40/18 12/21+40/90 84/21+40/18