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Add 21/30 and 4/18

21/30 + 4/18 is 83/90.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 18 is 90
  2. For the 1st fraction, since 30 × 3 = 90,
    21/30 = 21 × 3/30 × 3 = 63/90
  3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
    4/18 = 4 × 5/18 × 5 = 20/90
  4. Add the two fractions:
    63/90 + 20/90 = 63 + 20/90 = 83/90
  5. So, 21/30 + 4/18 = 83/90

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