Add 72/20 and 21/16
1st number: 3 12/20, 2nd number: 1 5/16
72/20 + 21/16 is 393/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
72/20 = 72 × 4/20 × 4 = 288/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80 - Add the two like fractions:
288/80 + 105/80 = 288 + 105/80 = 393/80 - So, 72/20 + 21/16 = 393/80
In mixed form: 473/80
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