Add 45/21 and 28/12
1st number: 2 3/21, 2nd number: 2 4/12
45/21 + 28/12 is 94/21.
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,
45/21 = 45 × 4/21 × 4 = 180/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
28/12 = 28 × 7/12 × 7 = 196/84 - Add the two like fractions:
180/84 + 196/84 = 180 + 196/84 = 376/84 - 376/84 simplified gives 94/21
- So, 45/21 + 28/12 = 94/21
In mixed form: 410/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21+28/12 45/21+56/12 45/42+28/12 45/21+28/24 45/21+84/12 45/63+28/12 45/21+28/36 45/21+28/60 45/21+28/84