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Subtract 70/30 from 21/10

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

21/10 - 70/30 is -7/30.

Steps for subtracting fractions

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

    Next, find the equivalent fraction of both fractional numbers with denominator 30
  2. For the 1st fraction, since 10 × 3 = 30,
    21/10 = 21 × 3/10 × 3 = 63/30
  3. Likewise, for the 2nd fraction, since 30 × 1 = 30,
    70/30 = 70 × 1/30 × 1 = 70/30
  4. Subtract the two like fractions:
    63/30 - 70/30 = 63 - 70/30 = -7/30

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