Add 72/40 and 21/80
1st number: 1 32/40, 2nd number: 21/80
72/40 + 21/80 is 33/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 80 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 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Add the two like fractions:
144/80 + 21/80 = 144 + 21/80 = 165/80 - 165/80 simplified gives 33/16
- So, 72/40 + 21/80 = 33/16
In mixed form: 21/16
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