Compare 21/80 and 12/9
1st number: 21/80, 2nd number: 1 3/9
21/80 is smaller than 12/9
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
12/9 = 12 × 80/9 × 80 = 960/720 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/720 < 960/720 or 21/80 < 12/9
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