Add 5/20 and 1/21
5/20 + 1/21 is 25/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
5/20 = 5 × 21/20 × 21 = 105/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
1/21 = 1 × 20/21 × 20 = 20/420 - Add the two like fractions:
105/420 + 20/420 = 105 + 20/420 = 125/420 - 125/420 simplified gives 25/84
- So, 5/20 + 1/21 = 25/84
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