Add 36/12 and 8/21
1st number: 3 0/12, 2nd number: 8/21
36/12 + 8/21 is 71/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
36/12 = 36 × 7/12 × 7 = 252/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
8/21 = 8 × 4/21 × 4 = 32/84 - Add the two like fractions:
252/84 + 32/84 = 252 + 32/84 = 284/84 - 284/84 simplified gives 71/21
- So, 36/12 + 8/21 = 71/21
In mixed form: 38/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/12+8/21 36/12+16/21 36/24+8/21 36/12+8/42 36/12+24/21 36/12+8/63 36/12+40/21 36/60+8/21 36/12+56/21 36/84+8/21