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Subtract 48/90 from 21/30

21/30 - 48/90 is 1/6.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 90 is 90

    Next, find the equivalent fraction of both fractional numbers with denominator 90
  2. For the 1st fraction, since 30 × 3 = 90,
    21/30 = 21 × 3/30 × 3 = 63/90
  3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
    48/90 = 48 × 1/90 × 1 = 48/90
  4. Subtract the two like fractions:
    63/90 - 48/90 = 63 - 48/90 = 15/90
  5. After reducing the fraction, the answer is 1/6

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