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Subtract 3/45 from 7/70

7/70 - 3/45 is 1/30.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 45 is 630
  2. For the 1st fraction, since 70 × 9 = 630,
    7/70 = 7 × 9/70 × 9 = 63/630
  3. Likewise, for the 2nd fraction, since 45 × 14 = 630,
    3/45 = 3 × 14/45 × 14 = 42/630
  4. Subtract the two fractions:
    63/630 - 42/630 = 63 - 42/630 = 21/630
  5. After reducing the fraction, the answer is 1/30

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