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Add 25/8 and 42/20

1st number: 3 1/8, 2nd number: 2 2/20

25/8 + 42/20 is 209/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 20 is 40
  2. For the 1st fraction, since 8 × 5 = 40,
    25/8 = 25 × 5/8 × 5 = 125/40
  3. Likewise, for the 2nd fraction, since 20 × 2 = 40,
    42/20 = 42 × 2/20 × 2 = 84/40
  4. Add the two fractions:
    125/40 + 84/40 = 125 + 84/40 = 209/40
  5. In mixed form: 59/40

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