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Subtract 7/80 from 7/42

7/42 - 7/80 is 19/240.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 42 and 80 is 1680
  2. For the 1st fraction, since 42 × 40 = 1680,
    7/42 = 7 × 40/42 × 40 = 280/1680
  3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
    7/80 = 7 × 21/80 × 21 = 147/1680
  4. Subtract the two fractions:
    280/1680 - 147/1680 = 280 - 147/1680 = 133/1680
  5. After reducing the fraction, the answer is 19/240

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