Add 30/42 and 20/8
1st number: 30/42, 2nd number: 2 4/8
30/42 + 20/8 is 45/14.
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,
30/42 = 30 × 4/42 × 4 = 120/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
20/8 = 20 × 21/8 × 21 = 420/168 - Add the two like fractions:
120/168 + 420/168 = 120 + 420/168 = 540/168 - 540/168 simplified gives 45/14
- So, 30/42 + 20/8 = 45/14
In mixed form: 33/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42+20/8 30/42+40/8 30/84+20/8 30/42+20/16 90/42+20/8 30/42+60/8 30/42+20/24 30/42+20/40 30/42+20/56