Add 36/21 and 30/9
1st number: 1 15/21, 2nd number: 3 3/9
36/21 + 30/9 is 106/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
36/21 = 36 × 3/21 × 3 = 108/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
30/9 = 30 × 7/9 × 7 = 210/63 - Add the two like fractions:
108/63 + 210/63 = 108 + 210/63 = 318/63 - 318/63 simplified gives 106/21
- So, 36/21 + 30/9 = 106/21
In mixed form: 51/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21+30/9 36/21+60/9 36/42+30/9 36/21+30/18 36/21+90/9 36/63+30/9 36/21+30/27 36/21+30/45 36/21+30/63