Add 21/4 and 84/12
1st number: 5 1/4, 2nd number: 7 0/12
21/4 + 84/12 is 49/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
21/4 = 21 × 3/4 × 3 = 63/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
84/12 = 84 × 1/12 × 1 = 84/12 - Add the two like fractions:
63/12 + 84/12 = 63 + 84/12 = 147/12 - 147/12 simplified gives 49/4
- So, 21/4 + 84/12 = 49/4
In mixed form: 121/4
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