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Add 90/5 and 20/84

1st number: 18 0/5, 2nd number: 20/84

90/5 + 20/84 is 383/21.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 84 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 5 × 84 = 420,
    90/5 = 90 × 84/5 × 84 = 7560/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    20/84 = 20 × 5/84 × 5 = 100/420
  4. Add the two like fractions:
    7560/420 + 100/420 = 7560 + 100/420 = 7660/420
  5. 7660/420 simplified gives 383/21
  6. So, 90/5 + 20/84 = 383/21
    In mixed form: 185/21

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