Add 40/42 and 20/56
40/42 + 20/56 is 55/42.
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,
40/42 = 40 × 4/42 × 4 = 160/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
20/56 = 20 × 3/56 × 3 = 60/168 - Add the two like fractions:
160/168 + 60/168 = 160 + 60/168 = 220/168 - 220/168 simplified gives 55/42
- So, 40/42 + 20/56 = 55/42
In mixed form: 113/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+20/56 40/42+40/56 40/84+20/56 40/42+60/56