Compare 81/21 and 1/90
1st number: 3 18/21, 2nd number: 1/90
81/21 is greater than 1/90
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,
81/21 = 81 × 30/21 × 30 = 2430/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
1/90 = 1 × 7/90 × 7 = 7/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 2430/630 > 7/630 or 81/21 > 1/90
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