Add 42/21 and 3/4
1st number: 2 0/21, 2nd number: 3/4
42/21 + 3/4 is 11/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
42/21 = 42 × 4/21 × 4 = 168/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
3/4 = 3 × 21/4 × 21 = 63/84 - Add the two like fractions:
168/84 + 63/84 = 168 + 63/84 = 231/84 - 231/84 simplified gives 11/4
- So, 42/21 + 3/4 = 11/4
In mixed form: 23/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+3/4 42/21+6/4 42/21+3/8 42/21+9/4 42/63+3/4 42/21+3/12 42/21+15/4 42/21+3/20 42/21+21/4 42/21+3/28