Compare 21/5 and 90/21
1st number: 4 1/5, 2nd number: 4 6/21
21/5 is smaller than 90/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
21/5 = 21 × 21/5 × 21 = 441/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
90/21 = 90 × 5/21 × 5 = 450/105 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 441/105 < 450/105 or 21/5 < 90/21
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