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Add 21/50 and 63/90

21/50 + 63/90 is 28/25.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 50 and 90 is 450

    Next, find the equivalent fraction of both fractional numbers with denominator 450
  2. For the 1st fraction, since 50 × 9 = 450,
    21/50 = 21 × 9/50 × 9 = 189/450
  3. Likewise, for the 2nd fraction, since 90 × 5 = 450,
    63/90 = 63 × 5/90 × 5 = 315/450
  4. Add the two like fractions:
    189/450 + 315/450 = 189 + 315/450 = 504/450
  5. 504/450 simplified gives 28/25
  6. So, 21/50 + 63/90 = 28/25
    In mixed form: 13/25

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