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Add 28/10 and 4/90

1st number: 2 8/10, 2nd number: 4/90

28/10 + 4/90 is 128/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 90 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 10 × 9 = 90,
    28/10 = 28 × 9/10 × 9 = 252/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    4/90 = 4 × 1/90 × 1 = 4/90
  4. Add the two like fractions:
    252/90 + 4/90 = 252 + 4/90 = 256/90
  5. 256/90 simplified gives 128/45
  6. So, 28/10 + 4/90 = 128/45
    In mixed form: 238/45

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