Add 27/30 and 21/18
1st number: 27/30, 2nd number: 1 3/18
27/30 + 21/18 is 31/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
27/30 = 27 × 3/30 × 3 = 81/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Add the two like fractions:
81/90 + 105/90 = 81 + 105/90 = 186/90 - 186/90 simplified gives 31/15
- So, 27/30 + 21/18 = 31/15
In mixed form: 21/15
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