Compare 45/63 and 81/21
1st number: 45/63, 2nd number: 3 18/21
45/63 is smaller than 81/21
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 21 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
45/63 = 45 × 1/63 × 1 = 45/63 - Likewise, for the 2nd fraction, since 21 × 3 = 63,
81/21 = 81 × 3/21 × 3 = 243/63 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 45/63 < 243/63 or 45/63 < 81/21
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