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Add 36/72 and 42/80

36/72 + 42/80 is 41/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 72 and 80 is 720
  2. For the 1st fraction, since 72 × 10 = 720,
    36/72 = 36 × 10/72 × 10 = 360/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    42/80 = 42 × 9/80 × 9 = 378/720
  4. Add the two fractions:
    360/720 + 378/720 = 360 + 378/720 = 738/720
  5. 738/720 simplified gives 41/40
  6. So, 36/72 + 42/80 = 41/40
    In mixed form: 11/40

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