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Add 90/15 and 21/20

1st number: 6 0/15, 2nd number: 1 1/20

90/15 + 21/20 is 141/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 15 and 20 is 60

    Next, find the equivalent fraction of both fractional numbers with denominator 60
  2. For the 1st fraction, since 15 × 4 = 60,
    90/15 = 90 × 4/15 × 4 = 360/60
  3. Likewise, for the 2nd fraction, since 20 × 3 = 60,
    21/20 = 21 × 3/20 × 3 = 63/60
  4. Add the two like fractions:
    360/60 + 63/60 = 360 + 63/60 = 423/60
  5. 423/60 simplified gives 141/20
  6. So, 90/15 + 21/20 = 141/20
    In mixed form: 71/20

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