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Add 5/21 and 5/40

5/21 + 5/40 is 61/168.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 40 is 840

    Next, find the equivalent fraction of both fractional numbers with denominator 840
  2. For the 1st fraction, since 21 × 40 = 840,
    5/21 = 5 × 40/21 × 40 = 200/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    5/40 = 5 × 21/40 × 21 = 105/840
  4. Add the two like fractions:
    200/840 + 105/840 = 200 + 105/840 = 305/840
  5. 305/840 simplified gives 61/168
  6. So, 5/21 + 5/40 = 61/168

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