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Add 20/21 and 4/40

20/21 + 4/40 is 221/210.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 40 is 840
  2. For the 1st fraction, since 21 × 40 = 840,
    20/21 = 20 × 40/21 × 40 = 800/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    4/40 = 4 × 21/40 × 21 = 84/840
  4. Add the two fractions:
    800/840 + 84/840 = 800 + 84/840 = 884/840
  5. 884/840 simplified gives 221/210
  6. So, 20/21 + 4/40 = 221/210
    In mixed form: 111/210

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