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Add 21/5 and 40/90

1st number: 4 1/5, 2nd number: 40/90

21/5 + 40/90 is 209/45.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 90 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 5 × 18 = 90,
    21/5 = 21 × 18/5 × 18 = 378/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    40/90 = 40 × 1/90 × 1 = 40/90
  4. Add the two like fractions:
    378/90 + 40/90 = 378 + 40/90 = 418/90
  5. 418/90 simplified gives 209/45
  6. So, 21/5 + 40/90 = 209/45
    In mixed form: 429/45

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