Compare 18/81 and 25/40
18/81 is smaller than 25/40
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 40 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 81 × 40 = 3240,
18/81 = 18 × 40/81 × 40 = 720/3240 - Likewise, for the 2nd fraction, since 40 × 81 = 3240,
25/40 = 25 × 81/40 × 81 = 2025/3240 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 720/3240 < 2025/3240 or 18/81 < 25/40
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