Add 84/2 and 45/21
1st number: 42 0/2, 2nd number: 2 3/21
84/2 + 45/21 is 309/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
84/2 = 84 × 21/2 × 21 = 1764/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
45/21 = 45 × 2/21 × 2 = 90/42 - Add the two like fractions:
1764/42 + 90/42 = 1764 + 90/42 = 1854/42 - 1854/42 simplified gives 309/7
- So, 84/2 + 45/21 = 309/7
In mixed form: 441/7
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