Ed drew a scale drawing of a neighborhood park. The scale of the drawing was 9 millimeters = 1 meter. What is the drawing's scale factor? Simplify your answer and write it as a fraction.
+2668 1 meter = 1000 millimeters
In his drawing, 1,000 millimeters is 9 millimeters.
Thus, the scale factor is \(\color{brown}\boxed{1000\over9}\)
