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Add 90/16 and 42/20

1st number: 5 10/16, 2nd number: 2 2/20

90/16 + 42/20 is 309/40.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 16 and 20 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 16 × 5 = 80,
    90/16 = 90 × 5/16 × 5 = 450/80
  3. Likewise, for the 2nd fraction, since 20 × 4 = 80,
    42/20 = 42 × 4/20 × 4 = 168/80
  4. Add the two like fractions:
    450/80 + 168/80 = 450 + 168/80 = 618/80
  5. 618/80 simplified gives 309/40
  6. So, 90/16 + 42/20 = 309/40
    In mixed form: 729/40

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