Compare 21/84 and 18/25
21/84 is smaller than 18/25
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 25 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
21/84 = 21 × 25/84 × 25 = 525/2100 - Likewise, for the 2nd fraction, since 25 × 84 = 2100,
18/25 = 18 × 84/25 × 84 = 1512/2100 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 525/2100 < 1512/2100 or 21/84 < 18/25
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