Compare 21/5 and 15/45
1st number: 4 1/5, 2nd number: 15/45
21/5 is greater than 15/45
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
21/5 = 21 × 9/5 × 9 = 189/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
15/45 = 15 × 1/45 × 1 = 15/45 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/45 > 15/45 or 21/5 > 15/45
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