Add 12/21 and 40/7
1st number: 12/21, 2nd number: 5 5/7
12/21 + 40/7 is 44/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
12/21 = 12 × 1/21 × 1 = 12/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
40/7 = 40 × 3/7 × 3 = 120/21 - Add the two like fractions:
12/21 + 120/21 = 12 + 120/21 = 132/21 - 132/21 simplified gives 44/7
- So, 12/21 + 40/7 = 44/7
In mixed form: 62/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+40/7 12/21+80/7 12/42+40/7 12/21+40/14 36/21+40/7 12/63+40/7 12/21+40/21 60/21+40/7 12/21+40/35 84/21+40/7 12/21+40/49