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Subtract 24/10 from 21/30

1st number: 21/30, 2nd number: 2 4/10

21/30 - 24/10 is -17/10.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 10 is 30

    Next, find the equivalent fraction of both fractional numbers with denominator 30
  2. For the 1st fraction, since 30 × 1 = 30,
    21/30 = 21 × 1/30 × 1 = 21/30
  3. Likewise, for the 2nd fraction, since 10 × 3 = 30,
    24/10 = 24 × 3/10 × 3 = 72/30
  4. Subtract the two like fractions:
    21/30 - 72/30 = 21 - 72/30 = -51/30
  5. After reducing the fraction, the answer is -17/10

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