Compare 21/12 and 28/20
1st number: 1 9/12, 2nd number: 1 8/20
21/12 is greater than 28/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
21/12 = 21 × 5/12 × 5 = 105/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
28/20 = 28 × 3/20 × 3 = 84/60 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 105/60 > 84/60 or 21/12 > 28/20
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