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Add 20/21 and 8/40

20/21 + 8/40 is 121/105.

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,
    8/40 = 8 × 21/40 × 21 = 168/840
  4. Add the two fractions:
    800/840 + 168/840 = 800 + 168/840 = 968/840
  5. 968/840 simplified gives 121/105
  6. So, 20/21 + 8/40 = 121/105
    In mixed form: 116/105

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