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Add 5/20 and 4/21

5/20 + 4/21 is 37/84.

Steps for adding fractions

  1. 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
  2. For the 1st fraction, since 20 × 21 = 420,
    5/20 = 5 × 21/20 × 21 = 105/420
  3. Likewise, for the 2nd fraction, since 21 × 20 = 420,
    4/21 = 4 × 20/21 × 20 = 80/420
  4. Add the two like fractions:
    105/420 + 80/420 = 105 + 80/420 = 185/420
  5. 185/420 simplified gives 37/84
  6. So, 5/20 + 4/21 = 37/84

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