Add 12/42 and 30/56
12/42 + 30/56 is 23/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
12/42 = 12 × 4/42 × 4 = 48/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
30/56 = 30 × 3/56 × 3 = 90/168 - Add the two like fractions:
48/168 + 90/168 = 48 + 90/168 = 138/168 - 138/168 simplified gives 23/28
- So, 12/42 + 30/56 = 23/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42+30/56 12/42+60/56 12/84+30/56 36/42+30/56 12/42+90/56 60/42+30/56 84/42+30/56