Add 7/42 and 20/8
1st number: 7/42, 2nd number: 2 4/8
7/42 + 20/8 is 8/3.
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,
7/42 = 7 × 4/42 × 4 = 28/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
20/8 = 20 × 21/8 × 21 = 420/168 - Add the two like fractions:
28/168 + 420/168 = 28 + 420/168 = 448/168 - 448/168 simplified gives 8/3
- So, 7/42 + 20/8 = 8/3
In mixed form: 22/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/42+20/8 7/42+40/8 7/84+20/8 7/42+20/16 21/42+20/8 7/42+60/8 7/42+20/24 35/42+20/8 7/42+20/40 49/42+20/8 7/42+20/56