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Add 90/10 and 20/42

1st number: 9 0/10, 2nd number: 20/42

90/10 + 20/42 is 199/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 42 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 42 × 5 = 210,
    20/42 = 20 × 5/42 × 5 = 100/210
  4. Add the two like fractions:
    1890/210 + 100/210 = 1890 + 100/210 = 1990/210
  5. 1990/210 simplified gives 199/21
  6. So, 90/10 + 20/42 = 199/21
    In mixed form: 910/21

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