Add 72/20 and 28/30
1st number: 3 12/20, 2nd number: 28/30
72/20 + 28/30 is 68/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
72/20 = 72 × 3/20 × 3 = 216/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
28/30 = 28 × 2/30 × 2 = 56/60 - Add the two like fractions:
216/60 + 56/60 = 216 + 56/60 = 272/60 - 272/60 simplified gives 68/15
- So, 72/20 + 28/30 = 68/15
In mixed form: 48/15
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