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Add 5/42 and 4/20

5/42 + 4/20 is 67/210.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 20 is 420
  2. For the 1st fraction, since 42 × 10 = 420,
    5/42 = 5 × 10/42 × 10 = 50/420
  3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
    4/20 = 4 × 21/20 × 21 = 84/420
  4. Add the two fractions:
    50/420 + 84/420 = 50 + 84/420 = 134/420
  5. 134/420 simplified gives 67/210
  6. So, 5/42 + 4/20 = 67/210

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