Add 20/42 and 15/56
20/42 + 15/56 is 125/168.
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,
15/56 = 15 × 3/56 × 3 = 45/168 - Add the two like fractions:
80/168 + 45/168 = 80 + 45/168 = 125/168 - So, 20/42 + 15/56 = 125/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+15/56 20/42+30/56 20/84+15/56 60/42+15/56 20/42+45/56 20/42+75/56