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Subtract 9/40 from 42/18

1st number: 2 6/18, 2nd number: 9/40

42/18 - 9/40 is 253/120.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 18 and 40 is 360

    Next, find the equivalent fraction of both fractional numbers with denominator 360
  2. For the 1st fraction, since 18 × 20 = 360,
    42/18 = 42 × 20/18 × 20 = 840/360
  3. Likewise, for the 2nd fraction, since 40 × 9 = 360,
    9/40 = 9 × 9/40 × 9 = 81/360
  4. Subtract the two like fractions:
    840/360 - 81/360 = 840 - 81/360 = 759/360
  5. After reducing the fraction, the answer is 253/120
  6. In mixed form: 213/120

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