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Add 21/10 and 90/28

1st number: 2 1/10, 2nd number: 3 6/28

21/10 + 90/28 is 186/35.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 28 is 140

    Next, find the equivalent fraction of both fractional numbers with denominator 140
  2. For the 1st fraction, since 10 × 14 = 140,
    21/10 = 21 × 14/10 × 14 = 294/140
  3. Likewise, for the 2nd fraction, since 28 × 5 = 140,
    90/28 = 90 × 5/28 × 5 = 450/140
  4. Add the two like fractions:
    294/140 + 450/140 = 294 + 450/140 = 744/140
  5. 744/140 simplified gives 186/35
  6. So, 21/10 + 90/28 = 186/35
    In mixed form: 511/35

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