Compare 5/21 and 27/90
5/21 is smaller than 27/90
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
5/21 = 5 × 30/21 × 30 = 150/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
27/90 = 27 × 7/90 × 7 = 189/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 150/630 < 189/630 or 5/21 < 27/90
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