Add 27/21 and 16/12
1st number: 1 6/21, 2nd number: 1 4/12
27/21 + 16/12 is 55/21.
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,
27/21 = 27 × 4/21 × 4 = 108/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
16/12 = 16 × 7/12 × 7 = 112/84 - Add the two like fractions:
108/84 + 112/84 = 108 + 112/84 = 220/84 - 220/84 simplified gives 55/21
- So, 27/21 + 16/12 = 55/21
In mixed form: 213/21
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 27/21+32/12 27/42+16/12 27/21+16/24 81/21+16/12 27/21+48/12 27/63+16/12 27/21+16/36 27/21+80/12 27/21+16/60 27/21+16/84