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Subtract 5/42 from 4/5

4/5 - 5/42 is 143/210.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 42 is 210
  2. For the 1st fraction, since 5 × 42 = 210,
    4/5 = 4 × 42/5 × 42 = 168/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    5/42 = 5 × 5/42 × 5 = 25/210
  4. Subtract the two fractions:
    168/210 - 25/210 = 168 - 25/210 = 143/210

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