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