Add 84/21 and 12/4
1st number: 4 0/21, 2nd number: 3 0/4
84/21 + 12/4 is 7/1.
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,
84/21 = 84 × 4/21 × 4 = 336/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
12/4 = 12 × 21/4 × 21 = 252/84 - Add the two like fractions:
336/84 + 252/84 = 336 + 252/84 = 588/84 - 588/84 simplified gives 7/1
- So, 84/21 + 12/4 = 7/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+24/4 84/42+12/4 84/21+12/8 84/21+36/4 84/63+12/4 84/21+60/4 84/21+12/20 84/21+84/4 84/21+12/28