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Subtract 90/42 from 8/5

1st number: 1 3/5, 2nd number: 2 6/42

8/5 - 90/42 is -19/35.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 5 and 42 is 210
  2. For the 1st fraction, since 5 × 42 = 210,
    8/5 = 8 × 42/5 × 42 = 336/210
  3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
    90/42 = 90 × 5/42 × 5 = 450/210
  4. Subtract the two fractions:
    336/210 - 450/210 = 336 - 450/210 = -114/210
  5. After reducing the fraction, the answer is -19/35

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