Add 12/84 and 70/21
1st number: 12/84, 2nd number: 3 7/21
12/84 + 70/21 is 73/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
12/84 = 12 × 1/84 × 1 = 12/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
70/21 = 70 × 4/21 × 4 = 280/84 - Add the two like fractions:
12/84 + 280/84 = 12 + 280/84 = 292/84 - 292/84 simplified gives 73/21
- So, 12/84 + 70/21 = 73/21
In mixed form: 310/21
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