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Subtract 21/8 from 18/50

1st number: 18/50, 2nd number: 2 5/8

18/50 - 21/8 is -453/200.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 50 and 8 is 200

    Next, find the equivalent fraction of both fractional numbers with denominator 200
  2. For the 1st fraction, since 50 × 4 = 200,
    18/50 = 18 × 4/50 × 4 = 72/200
  3. Likewise, for the 2nd fraction, since 8 × 25 = 200,
    21/8 = 21 × 25/8 × 25 = 525/200
  4. Subtract the two like fractions:
    72/200 - 525/200 = 72 - 525/200 = -453/200

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