Add 2/42 and 30/21
1st number: 2/42, 2nd number: 1 9/21
2/42 + 30/21 is 31/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
2/42 = 2 × 1/42 × 1 = 2/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
30/21 = 30 × 2/21 × 2 = 60/42 - Add the two like fractions:
2/42 + 60/42 = 2 + 60/42 = 62/42 - 62/42 simplified gives 31/21
- So, 2/42 + 30/21 = 31/21
In mixed form: 110/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/42+30/21 2/42+60/21 2/84+30/21 2/42+30/42 6/42+30/21 2/42+90/21 2/42+30/63 10/42+30/21 14/42+30/21