Add 21/84 and 5/20
21/84 + 5/20 is 1/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
5/20 = 5 × 21/20 × 21 = 105/420 - Add the two like fractions:
105/420 + 105/420 = 105 + 105/420 = 210/420 - 210/420 simplified gives 1/2
- So, 21/84 + 5/20 = 1/2
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