Add 21/84 and 28/8
1st number: 21/84, 2nd number: 3 4/8
21/84 + 28/8 is 15/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
21/84 = 21 × 2/84 × 2 = 42/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
28/8 = 28 × 21/8 × 21 = 588/168 - Add the two like fractions:
42/168 + 588/168 = 42 + 588/168 = 630/168 - 630/168 simplified gives 15/4
- So, 21/84 + 28/8 = 15/4
In mixed form: 33/4
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