Add 21/4 and 18/27
1st number: 5 1/4, 2nd number: 18/27
21/4 + 18/27 is 71/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 4 × 27 = 108,
21/4 = 21 × 27/4 × 27 = 567/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
18/27 = 18 × 4/27 × 4 = 72/108 - Add the two like fractions:
567/108 + 72/108 = 567 + 72/108 = 639/108 - 639/108 simplified gives 71/12
- So, 21/4 + 18/27 = 71/12
In mixed form: 511/12
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