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Subtract 9/80 from 42/10

1st number: 4 2/10, 2nd number: 9/80

42/10 - 9/80 is 327/80.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 80 is 80

    Next, find the equivalent fraction of both fractional numbers with denominator 80
  2. For the 1st fraction, since 10 × 8 = 80,
    42/10 = 42 × 8/10 × 8 = 336/80
  3. Likewise, for the 2nd fraction, since 80 × 1 = 80,
    9/80 = 9 × 1/80 × 1 = 9/80
  4. Subtract the two like fractions:
    336/80 - 9/80 = 336 - 9/80 = 327/80
  5. In mixed form: 47/80

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