Add 72/20 and 9/30
1st number: 3 12/20, 2nd number: 9/30
72/20 + 9/30 is 39/10.
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,
9/30 = 9 × 2/30 × 2 = 18/60 - Add the two like fractions:
216/60 + 18/60 = 216 + 18/60 = 234/60 - 234/60 simplified gives 39/10
- So, 72/20 + 9/30 = 39/10
In mixed form: 39/10
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