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Subtract 45/70 from 21/4

1st number: 5 1/4, 2nd number: 45/70

21/4 - 45/70 is 129/28.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 4 and 70 is 140
  2. For the 1st fraction, since 4 × 35 = 140,
    21/4 = 21 × 35/4 × 35 = 735/140
  3. Likewise, for the 2nd fraction, since 70 × 2 = 140,
    45/70 = 45 × 2/70 × 2 = 90/140
  4. Subtract the two fractions:
    735/140 - 90/140 = 735 - 90/140 = 645/140
  5. After reducing the fraction, the answer is 129/28
  6. In mixed form: 417/28

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