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Add 21/4 and 90/25

1st number: 5 1/4, 2nd number: 3 15/25

21/4 + 90/25 is 177/20.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 25 is 100

    Next, find the equivalent fraction of both fractional numbers with denominator 100
  2. For the 1st fraction, since 4 × 25 = 100,
    21/4 = 21 × 25/4 × 25 = 525/100
  3. Likewise, for the 2nd fraction, since 25 × 4 = 100,
    90/25 = 90 × 4/25 × 4 = 360/100
  4. Add the two like fractions:
    525/100 + 360/100 = 525 + 360/100 = 885/100
  5. 885/100 simplified gives 177/20
  6. So, 21/4 + 90/25 = 177/20
    In mixed form: 817/20

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