Compare 80/45 and 21/12
1st number: 1 35/45, 2nd number: 1 9/12
80/45 is greater than 21/12
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
80/45 = 80 × 4/45 × 4 = 320/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
21/12 = 21 × 15/12 × 15 = 315/180 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 320/180 > 315/180 or 80/45 > 21/12
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