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Subtract 90/50 from 20/70

1st number: 20/70, 2nd number: 1 40/50

20/70 - 90/50 is -53/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 50 is 350
  2. For the 1st fraction, since 70 × 5 = 350,
    20/70 = 20 × 5/70 × 5 = 100/350
  3. Likewise, for the 2nd fraction, since 50 × 7 = 350,
    90/50 = 90 × 7/50 × 7 = 630/350
  4. Subtract the two fractions:
    100/350 - 630/350 = 100 - 630/350 = -530/350
  5. After reducing the fraction, the answer is -53/35

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