Add 30/42 and 56/20
1st number: 30/42, 2nd number: 2 16/20
30/42 + 56/20 is 123/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
30/42 = 30 × 10/42 × 10 = 300/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
56/20 = 56 × 21/20 × 21 = 1176/420 - Add the two like fractions:
300/420 + 1176/420 = 300 + 1176/420 = 1476/420 - 1476/420 simplified gives 123/35
- So, 30/42 + 56/20 = 123/35
In mixed form: 318/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42+56/20 30/84+56/20 30/42+56/40 90/42+56/20 30/42+56/60