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Add 90/10 and 20/21

1st number: 9 0/10, 2nd number: 20/21

90/10 + 20/21 is 209/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 21 is 210

    Next, find the equivalent fraction of both fractional numbers with denominator 210
  2. For the 1st fraction, since 10 × 21 = 210,
    90/10 = 90 × 21/10 × 21 = 1890/210
  3. Likewise, for the 2nd fraction, since 21 × 10 = 210,
    20/21 = 20 × 10/21 × 10 = 200/210
  4. Add the two like fractions:
    1890/210 + 200/210 = 1890 + 200/210 = 2090/210
  5. 2090/210 simplified gives 209/21
  6. So, 90/10 + 20/21 = 209/21
    In mixed form: 920/21

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