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Subtract 90/10 from 21/4

1st number: 5 1/4, 2nd number: 9 0/10

21/4 - 90/10 is -15/4.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 10 is 20
  2. For the 1st fraction, since 4 × 5 = 20,
    21/4 = 21 × 5/4 × 5 = 105/20
  3. Likewise, for the 2nd fraction, since 10 × 2 = 20,
    90/10 = 90 × 2/10 × 2 = 180/20
  4. Subtract the two fractions:
    105/20 - 180/20 = 105 - 180/20 = -75/20
  5. After reducing the fraction, the answer is -15/4

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