Add 42/21 and 9/42
1st number: 2 0/21, 2nd number: 9/42
42/21 + 9/42 is 31/14.
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,
42/21 = 42 × 2/21 × 2 = 84/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
9/42 = 9 × 1/42 × 1 = 9/42 - Add the two like fractions:
84/42 + 9/42 = 84 + 9/42 = 93/42 - 93/42 simplified gives 31/14
- So, 42/21 + 9/42 = 31/14
In mixed form: 23/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+9/42 42/21+18/42 42/21+9/84 42/21+27/42 42/63+9/42 42/21+45/42 42/21+63/42