Add 5/42 and 20/8
1st number: 5/42, 2nd number: 2 4/8
5/42 + 20/8 is 55/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
5/42 = 5 × 4/42 × 4 = 20/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
20/8 = 20 × 21/8 × 21 = 420/168 - Add the two like fractions:
20/168 + 420/168 = 20 + 420/168 = 440/168 - 440/168 simplified gives 55/21
- So, 5/42 + 20/8 = 55/21
In mixed form: 213/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/42+20/8 5/42+40/8 5/84+20/8 5/42+20/16 15/42+20/8 5/42+60/8 5/42+20/24 25/42+20/8 5/42+20/40 35/42+20/8 5/42+20/56