Add 72/36 and 21/42
1st number: 2 0/36, 2nd number: 21/42
72/36 + 21/42 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 42 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
72/36 = 72 × 7/36 × 7 = 504/252 - Likewise, for the 2nd fraction, since 42 × 6 = 252,
21/42 = 21 × 6/42 × 6 = 126/252 - Add the two like fractions:
504/252 + 126/252 = 504 + 126/252 = 630/252 - 630/252 simplified gives 5/2
- So, 72/36 + 21/42 = 5/2
In mixed form: 21/2
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