Add 3/84 and 21/7
1st number: 3/84, 2nd number: 3 0/7
3/84 + 21/7 is 85/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
3/84 = 3 × 1/84 × 1 = 3/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
21/7 = 21 × 12/7 × 12 = 252/84 - Add the two like fractions:
3/84 + 252/84 = 3 + 252/84 = 255/84 - 255/84 simplified gives 85/28
- So, 3/84 + 21/7 = 85/28
In mixed form: 31/28
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