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Add 81/90 and 40/28

1st number: 81/90, 2nd number: 1 12/28

81/90 + 40/28 is 163/70.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 28 is 1260

    Next, find the equivalent fraction of both fractional numbers with denominator 1260
  2. For the 1st fraction, since 90 × 14 = 1260,
    81/90 = 81 × 14/90 × 14 = 1134/1260
  3. Likewise, for the 2nd fraction, since 28 × 45 = 1260,
    40/28 = 40 × 45/28 × 45 = 1800/1260
  4. Add the two like fractions:
    1134/1260 + 1800/1260 = 1134 + 1800/1260 = 2934/1260
  5. 2934/1260 simplified gives 163/70
  6. So, 81/90 + 40/28 = 163/70
    In mixed form: 223/70

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