Compare 81/21 and 7/45
1st number: 3 18/21, 2nd number: 7/45
81/21 is greater than 7/45
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
81/21 = 81 × 15/21 × 15 = 1215/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
7/45 = 7 × 7/45 × 7 = 49/315 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1215/315 > 49/315 or 81/21 > 7/45
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