Add 72/40 and 21/16
1st number: 1 32/40, 2nd number: 1 5/16
72/40 + 21/16 is 249/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 40 × 2 = 80,
72/40 = 72 × 2/40 × 2 = 144/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
21/16 = 21 × 5/16 × 5 = 105/80 - Add the two like fractions:
144/80 + 105/80 = 144 + 105/80 = 249/80 - So, 72/40 + 21/16 = 249/80
In mixed form: 39/80
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