Compare 72/21 and 45/90
1st number: 3 9/21, 2nd number: 45/90
72/21 is greater than 45/90
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,
72/21 = 72 × 30/21 × 30 = 2160/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
45/90 = 45 × 7/90 × 7 = 315/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 2160/630 > 315/630 or 72/21 > 45/90
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