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Add 90/21 and 10/28

1st number: 4 6/21, 2nd number: 10/28

90/21 + 10/28 is 65/14.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 28 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 21 × 4 = 84,
    90/21 = 90 × 4/21 × 4 = 360/84
  3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
    10/28 = 10 × 3/28 × 3 = 30/84
  4. Add the two like fractions:
    360/84 + 30/84 = 360 + 30/84 = 390/84
  5. 390/84 simplified gives 65/14
  6. So, 90/21 + 10/28 = 65/14
    In mixed form: 49/14

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