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Add 42/80 and 18/45

42/80 + 18/45 is 37/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 80 and 45 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 80 × 9 = 720,
    42/80 = 42 × 9/80 × 9 = 378/720
  3. Likewise, for the 2nd fraction, since 45 × 16 = 720,
    18/45 = 18 × 16/45 × 16 = 288/720
  4. Add the two like fractions:
    378/720 + 288/720 = 378 + 288/720 = 666/720
  5. 666/720 simplified gives 37/40
  6. So, 42/80 + 18/45 = 37/40

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