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Subtract 21/7 from 2/4

1st number: 2/4, 2nd number: 3 0/7

2/4 - 21/7 is -5/2.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 7 is 28
  2. For the 1st fraction, since 4 × 7 = 28,
    2/4 = 2 × 7/4 × 7 = 14/28
  3. Likewise, for the 2nd fraction, since 7 × 4 = 28,
    21/7 = 21 × 4/7 × 4 = 84/28
  4. Subtract the two fractions:
    14/28 - 84/28 = 14 - 84/28 = -70/28
  5. After reducing the fraction, the answer is -5/2

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