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Subtract 21/42 from 30/4

1st number: 7 2/4, 2nd number: 21/42

30/4 - 21/42 is 7/1.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 42 is 84

    Next, find the equivalent fraction of both fractional numbers with denominator 84
  2. For the 1st fraction, since 4 × 21 = 84,
    30/4 = 30 × 21/4 × 21 = 630/84
  3. Likewise, for the 2nd fraction, since 42 × 2 = 84,
    21/42 = 21 × 2/42 × 2 = 42/84
  4. Subtract the two like fractions:
    630/84 - 42/84 = 630 - 42/84 = 588/84
  5. After reducing the fraction, the answer is 7/1

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