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Compare 21/45 and 48/80

21/45 is smaller than 48/80

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 45 and 80 is 720
  2. For the 1st fraction, since 45 × 16 = 720,
    21/45 = 21 × 16/45 × 16 = 336/720
  3. Likewise, for the 2nd fraction, since 80 × 9 = 720,
    48/80 = 48 × 9/80 × 9 = 432/720
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 336/720 < 432/720 or 21/45 < 48/80

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