Add 2/42 and 84/21
1st number: 2/42, 2nd number: 4 0/21
2/42 + 84/21 is 85/21.
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,
84/21 = 84 × 2/21 × 2 = 168/42 - Add the two like fractions:
2/42 + 168/42 = 2 + 168/42 = 170/42 - 170/42 simplified gives 85/21
- So, 2/42 + 84/21 = 85/21
In mixed form: 41/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/42+84/21 2/84+84/21 2/42+84/42 6/42+84/21 2/42+84/63 10/42+84/21 14/42+84/21