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Subtract 7/80 from 42/30

1st number: 1 12/30, 2nd number: 7/80

42/30 - 7/80 is 21/16.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 80 is 240

    Next, find the equivalent fraction of both fractional numbers with denominator 240
  2. For the 1st fraction, since 30 × 8 = 240,
    42/30 = 42 × 8/30 × 8 = 336/240
  3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
    7/80 = 7 × 3/80 × 3 = 21/240
  4. Subtract the two like fractions:
    336/240 - 21/240 = 336 - 21/240 = 315/240
  5. After reducing the fraction, the answer is 21/16
  6. In mixed form: 15/16

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