Compare 21/18 and 15/45
1st number: 1 3/18, 2nd number: 15/45
21/18 is greater than 15/45
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
21/18 = 21 × 5/18 × 5 = 105/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
15/45 = 15 × 2/45 × 2 = 30/90 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 105/90 > 30/90 or 21/18 > 15/45
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