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Subtract 21/54 from 42/10

1st number: 4 2/10, 2nd number: 21/54

42/10 - 21/54 is 343/90.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 54 is 270
  2. For the 1st fraction, since 10 × 27 = 270,
    42/10 = 42 × 27/10 × 27 = 1134/270
  3. Likewise, for the 2nd fraction, since 54 × 5 = 270,
    21/54 = 21 × 5/54 × 5 = 105/270
  4. Subtract the two fractions:
    1134/270 - 105/270 = 1134 - 105/270 = 1029/270
  5. After reducing the fraction, the answer is 343/90
  6. In mixed form: 373/90

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