Add 72/21 and 36/6
1st number: 3 9/21, 2nd number: 6 0/6
72/21 + 36/6 is 66/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
72/21 = 72 × 2/21 × 2 = 144/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
36/6 = 36 × 7/6 × 7 = 252/42 - Add the two like fractions:
144/42 + 252/42 = 144 + 252/42 = 396/42 - 396/42 simplified gives 66/7
- So, 72/21 + 36/6 = 66/7
In mixed form: 93/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21+72/6 72/42+36/6 72/21+36/12 72/63+36/6 72/21+36/18 72/21+36/30 72/21+36/42