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Add 90/21 and 90/16

1st number: 4 6/21, 2nd number: 5 10/16

90/21 + 90/16 is 555/56.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 16 is 336
  2. For the 1st fraction, since 21 × 16 = 336,
    90/21 = 90 × 16/21 × 16 = 1440/336
  3. Likewise, for the 2nd fraction, since 16 × 21 = 336,
    90/16 = 90 × 21/16 × 21 = 1890/336
  4. Add the two fractions:
    1440/336 + 1890/336 = 1440 + 1890/336 = 3330/336
  5. 3330/336 simplified gives 555/56
  6. So, 90/21 + 90/16 = 555/56
    In mixed form: 951/56

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