Add 6/4 and 84/21
1st number: 1 2/4, 2nd number: 4 0/21
6/4 + 84/21 is 11/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
6/4 = 6 × 21/4 × 21 = 126/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
84/21 = 84 × 4/21 × 4 = 336/84 - Add the two like fractions:
126/84 + 336/84 = 126 + 336/84 = 462/84 - 462/84 simplified gives 11/2
- So, 6/4 + 84/21 = 11/2
In mixed form: 51/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/4+84/21 6/8+84/21 6/4+84/42 18/4+84/21 6/12+84/21 6/4+84/63 30/4+84/21 6/20+84/21 42/4+84/21 6/28+84/21