Add 84/21 and 12/10
1st number: 4 0/21, 2nd number: 1 2/10
84/21 + 12/10 is 26/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
84/21 = 84 × 10/21 × 10 = 840/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
12/10 = 12 × 21/10 × 21 = 252/210 - Add the two like fractions:
840/210 + 252/210 = 840 + 252/210 = 1092/210 - 1092/210 simplified gives 26/5
- So, 84/21 + 12/10 = 26/5
In mixed form: 51/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+24/10 84/42+12/10 84/21+12/20 84/21+36/10 84/63+12/10 84/21+12/30 84/21+60/10 84/21+12/50 84/21+84/10 84/21+12/70