Compare 21/20 and 81/5
1st number: 1 1/20, 2nd number: 16 1/5
21/20 is smaller than 81/5
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 5 is 20
Next, find the equivalent fraction of both fractional numbers with denominator 20 - For the 1st fraction, since 20 × 1 = 20,
21/20 = 21 × 1/20 × 1 = 21/20 - Likewise, for the 2nd fraction, since 5 × 4 = 20,
81/5 = 81 × 4/5 × 4 = 324/20 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 21/20 < 324/20 or 21/20 < 81/5
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