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Subtract 56/40 from 20/90

1st number: 20/90, 2nd number: 1 16/40

20/90 - 56/40 is -53/45.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 90 and 40 is 360
  2. For the 1st fraction, since 90 × 4 = 360,
    20/90 = 20 × 4/90 × 4 = 80/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    56/40 = 56 × 9/40 × 9 = 504/360
  4. Subtract the two fractions:
    80/360 - 504/360 = 80 - 504/360 = -424/360
  5. After reducing the fraction, the answer is -53/45

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