Compare 81/30 and 81/21
1st number: 2 21/30, 2nd number: 3 18/21
81/30 is smaller than 81/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
81/30 = 81 × 7/30 × 7 = 567/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
81/21 = 81 × 10/21 × 10 = 810/210 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 567/210 < 810/210 or 81/30 < 81/21
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