Add 72/5 and 21/20
1st number: 14 2/5, 2nd number: 1 1/20
72/5 + 21/20 is 309/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 20 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 5 × 4 = 20,
72/5 = 72 × 4/5 × 4 = 288/20 - Likewise, for the 2nd fraction, since 20 × 1 = 20,
21/20 = 21 × 1/20 × 1 = 21/20 - Add the two like fractions:
288/20 + 21/20 = 288 + 21/20 = 309/20 - So, 72/5 + 21/20 = 309/20
In mixed form: 159/20
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