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Add 1/21 and 6/40

1/21 + 6/40 is 83/420.

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,
    1/21 = 1 × 40/21 × 40 = 40/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    6/40 = 6 × 21/40 × 21 = 126/840
  4. Add the two fractions:
    40/840 + 126/840 = 40 + 126/840 = 166/840
  5. After reducing the fraction, the answer is 83/420

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