What are two fractions where the LCD is 20 but the product of the denominators is not 20.?

Consider the fractions ( \frac{3}{4} ) and ( \frac{1}{5} ). The least common denominator (LCD) of these fractions is 20, since 20 is the smallest multiple of both 4 and 5. However, the product of the denominators ( 4 \times 5 ) equals 20, which does not meet the condition. Instead, if we use ( \frac{3}{8} ) and ( \frac{1}{5} ), the LCD remains 40 (the smallest multiple of 8 and 5), while the product of the denominators ( 8 \times 5 = 40 ) also remains consistent. This demonstrates that while the LCD can be determined, the product of the denominators yields a different result.