Compare 21/12 and 75/45
1st number: 1 9/12, 2nd number: 1 30/45
21/12 is greater than 75/45
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
21/12 = 21 × 15/12 × 15 = 315/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
75/45 = 75 × 4/45 × 4 = 300/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 315/180 > 300/180 or 21/12 > 75/45
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