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Subtract 7/70 from 4/45

4/45 - 7/70 is -1/90.

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,
    4/45 = 4 × 14/45 × 14 = 56/630
  3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
    7/70 = 7 × 9/70 × 9 = 63/630
  4. Subtract the two fractions:
    56/630 - 63/630 = 56 - 63/630 = -7/630
  5. After reducing the fraction, the answer is -1/90

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