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Subtract 2/20 from 42/64

42/64 - 2/20 is 89/160.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 64 and 20 is 320

    Next, find the equivalent fraction of both fractional numbers with denominator 320
  2. For the 1st fraction, since 64 × 5 = 320,
    42/64 = 42 × 5/64 × 5 = 210/320
  3. Likewise, for the 2nd fraction, since 20 × 16 = 320,
    2/20 = 2 × 16/20 × 16 = 32/320
  4. Subtract the two like fractions:
    210/320 - 32/320 = 210 - 32/320 = 178/320
  5. After reducing the fraction, the answer is 89/160

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