Add 72/4 and 81/20
1st number: 18 0/4, 2nd number: 4 1/20
72/4 + 81/20 is 441/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 4 × 5 = 20,
72/4 = 72 × 5/4 × 5 = 360/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
81/20 = 81 × 1/20 × 1 = 81/20 - Add the two like fractions:
360/20 + 81/20 = 360 + 81/20 = 441/20 - So, 72/4 + 81/20 = 441/20
In mixed form: 221/20
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