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Subtract 18/84 from 72/10

1st number: 7 2/10, 2nd number: 18/84

72/10 - 18/84 is 489/70.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 10 and 84 is 420
  2. For the 1st fraction, since 10 × 42 = 420,
    72/10 = 72 × 42/10 × 42 = 3024/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    18/84 = 18 × 5/84 × 5 = 90/420
  4. Subtract the two fractions:
    3024/420 - 90/420 = 3024 - 90/420 = 2934/420
  5. After reducing the fraction, the answer is 489/70
  6. In mixed form: 669/70

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