Add 12/21 and 24/7
1st number: 12/21, 2nd number: 3 3/7
12/21 + 24/7 is 4/1.
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,
24/7 = 24 × 3/7 × 3 = 72/21 - Add the two like fractions:
12/21 + 72/21 = 12 + 72/21 = 84/21 - 84/21 simplified gives 4/1
- So, 12/21 + 24/7 = 4/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+24/7 12/21+48/7 12/42+24/7 12/21+24/14 36/21+24/7 12/21+72/7 12/63+24/7 12/21+24/21 60/21+24/7 12/21+24/35 84/21+24/7 12/21+24/49