Add 20/42 and 4/84
20/42 + 4/84 is 11/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
20/42 = 20 × 2/42 × 2 = 40/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
4/84 = 4 × 1/84 × 1 = 4/84 - Add the two like fractions:
40/84 + 4/84 = 40 + 4/84 = 44/84 - 44/84 simplified gives 11/21
- So, 20/42 + 4/84 = 11/21
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