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Subtract 98/80 from 21/30

1st number: 21/30, 2nd number: 1 18/80

21/30 - 98/80 is -21/40.

Steps for subtracting fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 30 and 80 is 240
  2. For the 1st fraction, since 30 × 8 = 240,
    21/30 = 21 × 8/30 × 8 = 168/240
  3. Likewise, for the 2nd fraction, since 80 × 3 = 240,
    98/80 = 98 × 3/80 × 3 = 294/240
  4. Subtract the two fractions:
    168/240 - 294/240 = 168 - 294/240 = -126/240
  5. After reducing the fraction, the answer is -21/40

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