Add 12/21 and 25/56
12/21 + 25/56 is 57/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
12/21 = 12 × 8/21 × 8 = 96/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
25/56 = 25 × 3/56 × 3 = 75/168 - Add the two like fractions:
96/168 + 75/168 = 96 + 75/168 = 171/168 - 171/168 simplified gives 57/56
- So, 12/21 + 25/56 = 57/56
In mixed form: 11/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+25/56 12/21+50/56 12/42+25/56 36/21+25/56 12/21+75/56 12/63+25/56 60/21+25/56 84/21+25/56