Add 84/21 and 2/42
1st number: 4 0/21, 2nd number: 2/42
84/21 + 2/42 is 85/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
84/21 = 84 × 2/21 × 2 = 168/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
2/42 = 2 × 1/42 × 1 = 2/42 - Add the two like fractions:
168/42 + 2/42 = 168 + 2/42 = 170/42 - 170/42 simplified gives 85/21
- So, 84/21 + 2/42 = 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: 84/21+4/42 84/42+2/42 84/21+2/84 84/21+6/42 84/63+2/42 84/21+10/42 84/21+14/42