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Add 90/75 and 70/80

1st number: 1 15/75, 2nd number: 70/80

90/75 + 70/80 is 83/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 75 and 80 is 1200

    Next, find the equivalent fraction of both fractional numbers with denominator 1200
  2. For the 1st fraction, since 75 × 16 = 1200,
    90/75 = 90 × 16/75 × 16 = 1440/1200
  3. Likewise, for the 2nd fraction, since 80 × 15 = 1200,
    70/80 = 70 × 15/80 × 15 = 1050/1200
  4. Add the two like fractions:
    1440/1200 + 1050/1200 = 1440 + 1050/1200 = 2490/1200
  5. 2490/1200 simplified gives 83/40
  6. So, 90/75 + 70/80 = 83/40
    In mixed form: 23/40

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