Add 72/20 and 21/4
1st number: 3 12/20, 2nd number: 5 1/4
72/20 + 21/4 is 177/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
72/20 = 72 × 1/20 × 1 = 72/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
21/4 = 21 × 5/4 × 5 = 105/20 - Add the two like fractions:
72/20 + 105/20 = 72 + 105/20 = 177/20 - So, 72/20 + 21/4 = 177/20
In mixed form: 817/20
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