Compare 21/25 and 12/45
21/25 is greater than 12/45
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 45 is 225
Next, find the equivalent fraction of both fractional numbers with denominator 225 - For the 1st fraction, since 25 × 9 = 225,
21/25 = 21 × 9/25 × 9 = 189/225 - Likewise, for the 2nd fraction, since 45 × 5 = 225,
12/45 = 12 × 5/45 × 5 = 60/225 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 189/225 > 60/225 or 21/25 > 12/45
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