Add 27/36 and 72/21
1st number: 27/36, 2nd number: 3 9/21
27/36 + 72/21 is 117/28.
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,
27/36 = 27 × 7/36 × 7 = 189/252 - Likewise, for the 2nd fraction, since 21 × 12 = 252,
72/21 = 72 × 12/21 × 12 = 864/252 - Add the two like fractions:
189/252 + 864/252 = 189 + 864/252 = 1053/252 - 1053/252 simplified gives 117/28
- So, 27/36 + 72/21 = 117/28
In mixed form: 45/28
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