Add 54/21 and 8/12
1st number: 2 12/21, 2nd number: 8/12
54/21 + 8/12 is 68/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
54/21 = 54 × 4/21 × 4 = 216/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
8/12 = 8 × 7/12 × 7 = 56/84 - Add the two like fractions:
216/84 + 56/84 = 216 + 56/84 = 272/84 - 272/84 simplified gives 68/21
- So, 54/21 + 8/12 = 68/21
In mixed form: 35/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+16/12 54/42+8/12 54/21+8/24 54/21+24/12 54/63+8/12 54/21+8/36 54/21+40/12 54/21+8/60 54/21+56/12 54/21+8/84