Add 20/42 and 18/3
1st number: 20/42, 2nd number: 6 0/3
20/42 + 18/3 is 136/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 3 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
20/42 = 20 × 1/42 × 1 = 20/42 - Likewise, for the 2nd fraction, since 3 × 14 = 42,
18/3 = 18 × 14/3 × 14 = 252/42 - Add the two like fractions:
20/42 + 252/42 = 20 + 252/42 = 272/42 - 272/42 simplified gives 136/21
- So, 20/42 + 18/3 = 136/21
In mixed form: 610/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+18/3 20/42+36/3 20/84+18/3 20/42+18/6 60/42+18/3 20/42+54/3 20/42+18/9 20/42+90/3 20/42+18/15 20/42+18/21