Add 21/84 and 3/7
21/84 + 3/7 is 19/28.
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,
21/84 = 21 × 1/84 × 1 = 21/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
3/7 = 3 × 12/7 × 12 = 36/84 - Add the two like fractions:
21/84 + 36/84 = 21 + 36/84 = 57/84 - 57/84 simplified gives 19/28
- So, 21/84 + 3/7 = 19/28
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