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Subtract 4/90 from 25/21

1st number: 1 4/21, 2nd number: 4/90

25/21 - 4/90 is 361/315.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 90 is 630
  2. For the 1st fraction, since 21 × 30 = 630,
    25/21 = 25 × 30/21 × 30 = 750/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    4/90 = 4 × 7/90 × 7 = 28/630
  4. Subtract the two fractions:
    750/630 - 28/630 = 750 - 28/630 = 722/630
  5. After reducing the fraction, the answer is 361/315
  6. In mixed form: 146/315

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