Add 1/2 and 72/21
1st number: 1/2, 2nd number: 3 9/21
1/2 + 72/21 is 55/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
1/2 = 1 × 21/2 × 21 = 21/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
72/21 = 72 × 2/21 × 2 = 144/42 - Add the two like fractions:
21/42 + 144/42 = 21 + 144/42 = 165/42 - 165/42 simplified gives 55/14
- So, 1/2 + 72/21 = 55/14
In mixed form: 313/14
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