A map scale can be expressed as a ratio or as a fraction; which statement is true?

• A. Only a ratio can express the scale
• B. Both a ratio and a fraction can express the scale
• C. Only a fraction can express the scale
• D. Neither can express the scale

Answer: (B)

A map scale expresses how distances on the map relate to real-world distances, and that relationship can be written in more than one way. If 1 unit on the map corresponds to 50,000 units on the ground, you can write this as a ratio 1:50,000 or as a fraction 1/50,000—the two forms convey the same proportion. The ratio form (with a colon) and the fractional form are simply two notations for the same concept, so both are valid representations of the scale. Keeping units consistent is the key, but as long as the relationship is preserved, either notation works.