Add 42/21 and 9/6
1st number: 2 0/21, 2nd number: 1 3/6
42/21 + 9/6 is 7/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
42/21 = 42 × 2/21 × 2 = 84/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
9/6 = 9 × 7/6 × 7 = 63/42 - Add the two like fractions:
84/42 + 63/42 = 84 + 63/42 = 147/42 - 147/42 simplified gives 7/2
- So, 42/21 + 9/6 = 7/2
In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+9/6 42/21+18/6 42/21+9/12 42/21+27/6 42/63+9/6 42/21+9/18 42/21+45/6 42/21+9/30 42/21+63/6 42/21+9/42