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Add 90/20 and 9/40

1st number: 4 10/20, 2nd number: 9/40

90/20 + 9/40 is 189/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 40 is 40
  2. For the 1st fraction, since 20 × 2 = 40,
    90/20 = 90 × 2/20 × 2 = 180/40
  3. Likewise, for the 2nd fraction, since 40 × 1 = 40,
    9/40 = 9 × 1/40 × 1 = 9/40
  4. Add the two fractions:
    180/40 + 9/40 = 180 + 9/40 = 189/40
  5. So, 90/20 + 9/40 = 189/40
    In mixed form: 429/40

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