Add 72/30 and 36/20
1st number: 2 12/30, 2nd number: 1 16/20
72/30 + 36/20 is 21/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
72/30 = 72 × 2/30 × 2 = 144/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
36/20 = 36 × 3/20 × 3 = 108/60 - Add the two like fractions:
144/60 + 108/60 = 144 + 108/60 = 252/60 - 252/60 simplified gives 21/5
- So, 72/30 + 36/20 = 21/5
In mixed form: 41/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30+72/20 72/60+36/20 72/30+36/40 72/90+36/20 72/30+36/60