Add 20/42 and 28/56
20/42 + 28/56 is 41/42.
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,
20/42 = 20 × 4/42 × 4 = 80/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
28/56 = 28 × 3/56 × 3 = 84/168 - Add the two like fractions:
80/168 + 84/168 = 80 + 84/168 = 164/168 - 164/168 simplified gives 41/42
- So, 20/42 + 28/56 = 41/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+28/56 20/84+28/56 60/42+28/56 20/42+84/56