Compare 9/81 and 4/20
9/81 is smaller than 4/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 20 is 1620
Next, find the equivalent fraction of both fractional numbers with denominator 1620 - For the 1st fraction, since 81 × 20 = 1620,
9/81 = 9 × 20/81 × 20 = 180/1620 - Likewise, for the 2nd fraction, since 20 × 81 = 1620,
4/20 = 4 × 81/20 × 81 = 324/1620 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 180/1620 < 324/1620 or 9/81 < 4/20
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