Compare 20/45 and 21/54
20/45 is greater than 21/54
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 45 × 6 = 270,
20/45 = 20 × 6/45 × 6 = 120/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
21/54 = 21 × 5/54 × 5 = 105/270 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 120/270 > 105/270 or 20/45 > 21/54
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