Add 21/8 and 18/16
1st number: 2 5/8, 2nd number: 1 2/16
21/8 + 18/16 is 15/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 16 is 16
Next, find the equivalent fraction of both fractional numbers with denominator 16 - For the 1st fraction, since 8 × 2 = 16,
21/8 = 21 × 2/8 × 2 = 42/16 - Likewise, for the 2nd fraction, since 16 × 1 = 16,
18/16 = 18 × 1/16 × 1 = 18/16 - Add the two like fractions:
42/16 + 18/16 = 42 + 18/16 = 60/16 - 60/16 simplified gives 15/4
- So, 21/8 + 18/16 = 15/4
In mixed form: 33/4
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