Add 1/12 and 32/21
1st number: 1/12, 2nd number: 1 11/21
1/12 + 32/21 is 45/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
1/12 = 1 × 7/12 × 7 = 7/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
32/21 = 32 × 4/21 × 4 = 128/84 - Add the two like fractions:
7/84 + 128/84 = 7 + 128/84 = 135/84 - 135/84 simplified gives 45/28
- So, 1/12 + 32/21 = 45/28
In mixed form: 117/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/12+32/21 1/12+64/21 1/24+32/21 1/12+32/42 3/12+32/21 1/12+96/21 1/36+32/21 1/12+32/63 5/12+32/21 1/60+32/21 7/12+32/21 1/84+32/21