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Subtract 3/90 from 10/42

10/42 - 3/90 is 43/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 90 is 630
  2. For the 1st fraction, since 42 × 15 = 630,
    10/42 = 10 × 15/42 × 15 = 150/630
  3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
    3/90 = 3 × 7/90 × 7 = 21/630
  4. Subtract the two fractions:
    150/630 - 21/630 = 150 - 21/630 = 129/630
  5. After reducing the fraction, the answer is 43/210

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