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Subtract 40/70 from 8/45

8/45 - 40/70 is -124/315.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 70 is 630
  2. For the 1st fraction, since 45 × 14 = 630,
    8/45 = 8 × 14/45 × 14 = 112/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    40/70 = 40 × 9/70 × 9 = 360/630
  4. Subtract the two fractions:
    112/630 - 360/630 = 112 - 360/630 = -248/630
  5. After reducing the fraction, the answer is -124/315

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