Compare 12/5 and 45/21
1st number: 2 2/5, 2nd number: 2 3/21
12/5 is greater than 45/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
12/5 = 12 × 21/5 × 21 = 252/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
45/21 = 45 × 5/21 × 5 = 225/105 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 252/105 > 225/105 or 12/5 > 45/21
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