Compare 81/20 and 21/4
1st number: 4 1/20, 2nd number: 5 1/4
81/20 is smaller than 21/4
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 4 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
81/20 = 81 × 1/20 × 1 = 81/20 - Likewise, for the 2nd fraction, since 4 × 5 = 20,
21/4 = 21 × 5/4 × 5 = 105/20 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 81/20 < 105/20 or 81/20 < 21/4
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