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Add 21/16 and 28/90

1st number: 1 5/16, 2nd number: 28/90

21/16 + 28/90 is 1169/720.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 90 is 720

    Next, find the equivalent fraction of both fractional numbers with denominator 720
  2. For the 1st fraction, since 16 × 45 = 720,
    21/16 = 21 × 45/16 × 45 = 945/720
  3. Likewise, for the 2nd fraction, since 90 × 8 = 720,
    28/90 = 28 × 8/90 × 8 = 224/720
  4. Add the two like fractions:
    945/720 + 224/720 = 945 + 224/720 = 1169/720
  5. So, 21/16 + 28/90 = 1169/720
    In mixed form: 1449/720

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