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Subtract 20/70 from 15/8

1st number: 1 7/8, 2nd number: 20/70

15/8 - 20/70 is 89/56.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 8 and 70 is 280
  2. For the 1st fraction, since 8 × 35 = 280,
    15/8 = 15 × 35/8 × 35 = 525/280
  3. Likewise, for the 2nd fraction, since 70 × 4 = 280,
    20/70 = 20 × 4/70 × 4 = 80/280
  4. Subtract the two fractions:
    525/280 - 80/280 = 525 - 80/280 = 445/280
  5. After reducing the fraction, the answer is 89/56
  6. In mixed form: 133/56

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