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Add 25/21 and 15/40

1st number: 1 4/21, 2nd number: 15/40

25/21 + 15/40 is 263/168.

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,
    25/21 = 25 × 40/21 × 40 = 1000/840
  3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
    15/40 = 15 × 21/40 × 21 = 315/840
  4. Add the two like fractions:
    1000/840 + 315/840 = 1000 + 315/840 = 1315/840
  5. 1315/840 simplified gives 263/168
  6. So, 25/21 + 15/40 = 263/168
    In mixed form: 195/168

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