Add 21/84 and 25/42
21/84 + 25/42 is 71/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 42 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 42 × 2 = 84,
25/42 = 25 × 2/42 × 2 = 50/84 - Add the two like fractions:
21/84 + 50/84 = 21 + 50/84 = 71/84 - So, 21/84 + 25/42 = 71/84
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