Compare 20/42 and 28/45
20/42 is smaller than 28/45
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
20/42 = 20 × 15/42 × 15 = 300/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
28/45 = 28 × 14/45 × 14 = 392/630 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 300/630 < 392/630 or 20/42 < 28/45
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