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Add 90/36 and 21/80

1st number: 2 18/36, 2nd number: 21/80

90/36 + 21/80 is 221/80.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 36 and 80 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 36 × 20 = 720,
    90/36 = 90 × 20/36 × 20 = 1800/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    21/80 = 21 × 9/80 × 9 = 189/720
  4. Add the two like fractions:
    1800/720 + 189/720 = 1800 + 189/720 = 1989/720
  5. 1989/720 simplified gives 221/80
  6. So, 90/36 + 21/80 = 221/80
    In mixed form: 261/80

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