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Add 21/90 and 4/18

21/90 + 4/18 is 41/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 18 is 90
  2. For the 1st fraction, since 90 × 1 = 90,
    21/90 = 21 × 1/90 × 1 = 21/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    4/18 = 4 × 5/18 × 5 = 20/90
  4. Add the two fractions:
    21/90 + 20/90 = 21 + 20/90 = 41/90
  5. So, 21/90 + 4/18 = 41/90

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