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Add 21/25 and 15/40

21/25 + 15/40 is 243/200.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 25 and 40 is 200

    Next, find the equivalent fraction of both fractional numbers with denominator 200
  2. For the 1st fraction, since 25 × 8 = 200,
    21/25 = 21 × 8/25 × 8 = 168/200
  3. Likewise, for the 2nd fraction, since 40 × 5 = 200,
    15/40 = 15 × 5/40 × 5 = 75/200
  4. Add the two like fractions:
    168/200 + 75/200 = 168 + 75/200 = 243/200
  5. So, 21/25 + 15/40 = 243/200
    In mixed form: 143/200

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