Add 81/36 and 12/21
1st number: 2 9/36, 2nd number: 12/21
81/36 + 12/21 is 79/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 21 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 36 × 7 = 252,
81/36 = 81 × 7/36 × 7 = 567/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
12/21 = 12 × 12/21 × 12 = 144/252 - Add the two like fractions:
567/252 + 144/252 = 567 + 144/252 = 711/252 - 711/252 simplified gives 79/28
- So, 81/36 + 12/21 = 79/28
In mixed form: 223/28
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