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Add 21/15 and 4/90

1st number: 1 6/15, 2nd number: 4/90

21/15 + 4/90 is 13/9.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 90 is 90
  2. For the 1st fraction, since 15 × 6 = 90,
    21/15 = 21 × 6/15 × 6 = 126/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    4/90 = 4 × 1/90 × 1 = 4/90
  4. Add the two fractions:
    126/90 + 4/90 = 126 + 4/90 = 130/90
  5. 130/90 simplified gives 13/9
  6. So, 21/15 + 4/90 = 13/9
    In mixed form: 14/9

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