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Compare 21/70 and 10/30

21/70 is smaller than 10/30

Steps for comparing fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 30 is 210
  2. For the 1st fraction, since 70 × 3 = 210,
    21/70 = 21 × 3/70 × 3 = 63/210
  3. Likewise, for the 2nd fraction, since 30 × 7 = 210,
    10/30 = 10 × 7/30 × 7 = 70/210
  4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
  5. 63/210 < 70/210 or 21/70 < 10/30

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