Add 72/20 and 81/60
1st number: 3 12/20, 2nd number: 1 21/60
72/20 + 81/60 is 99/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 60 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 60 × 1 = 60,
81/60 = 81 × 1/60 × 1 = 81/60 - Add the two like fractions:
216/60 + 81/60 = 216 + 81/60 = 297/60 - 297/60 simplified gives 99/20
- So, 72/20 + 81/60 = 99/20
In mixed form: 419/20
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