A parking lot has $25 \%$ more cars than trucks. The ratio of cars to trucks is
(A) $4: 3$
(B) $4: 1$
(C) $9: 5$
(D) $5: 4$
(E) $3: 1$
Solution 1

Since the lot has $25 \%$ more cars than trucks, and since we are asked to determine the ratio of cars to trucks, we may begin by choosing a convenient number of trucks in the lot.

Assume that there are 100 trucks in the lot.

Since there are $25 \%$ more cars than trucks, and since $25 \%$ of 100 is 25 , then there are 125 cars in the parking lot.

Therefore, the ratio of cars to trucks in the parking lot is $125: 100$ or $5: 4$.

## Solution 2

Assume that the number of trucks in the parking lot is $x$.

Since there are $25 \%$ more cars than trucks in the lot, then the number of cars is $1.25 x$.

The ratio of cars to trucks is $1.25 x: x$ or $1.25: 1$ or $(1.25 \times 4):(1 \times 4)=5: 4$.

ANSWER: (D)