Add 54/21 and 84/5
1st number: 2 12/21, 2nd number: 16 4/5
54/21 + 84/5 is 678/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
54/21 = 54 × 5/21 × 5 = 270/105 - Likewise, for the 2nd fraction, since 5 × 21 = 105,
84/5 = 84 × 21/5 × 21 = 1764/105 - Add the two like fractions:
270/105 + 1764/105 = 270 + 1764/105 = 2034/105 - 2034/105 simplified gives 678/35
- So, 54/21 + 84/5 = 678/35
In mixed form: 1913/35
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