Compare 20/4 and 45/21
1st number: 5 0/4, 2nd number: 2 3/21
20/4 is greater than 45/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
20/4 = 20 × 21/4 × 21 = 420/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
45/21 = 45 × 4/21 × 4 = 180/84 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 420/84 > 180/84 or 20/4 > 45/21
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