Compare 84/18 and 21/5
1st number: 4 12/18, 2nd number: 4 1/5
84/18 is greater than 21/5
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
84/18 = 84 × 5/18 × 5 = 420/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
21/5 = 21 × 18/5 × 18 = 378/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 420/90 > 378/90 or 84/18 > 21/5
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