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Subtract 16/90 from 21/60

21/60 - 16/90 is 31/180.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 60 and 90 is 180
  2. For the 1st fraction, since 60 × 3 = 180,
    21/60 = 21 × 3/60 × 3 = 63/180
  3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
    16/90 = 16 × 2/90 × 2 = 32/180
  4. Subtract the two fractions:
    63/180 - 32/180 = 63 - 32/180 = 31/180

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