Add 18/42 and 56/20
1st number: 18/42, 2nd number: 2 16/20
18/42 + 56/20 is 113/35.
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,
18/42 = 18 × 10/42 × 10 = 180/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
56/20 = 56 × 21/20 × 21 = 1176/420 - Add the two like fractions:
180/420 + 1176/420 = 180 + 1176/420 = 1356/420 - 1356/420 simplified gives 113/35
- So, 18/42 + 56/20 = 113/35
In mixed form: 38/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/42+56/20 18/84+56/20 18/42+56/40 54/42+56/20 18/42+56/60 90/42+56/20