Only Fractions with a Common Denominator can be directly compared.
I may be completely off base here, but since 1 meter = 39.3700787 inches (Google) and the scale is 1 inch to 1 meter, I beleive that makes it 1:39 scale. Basically, one inch on the map scale equals 39 inches in the real world.
A graphic scale is one type of map scale, which tells you how distance on the map compares to the actual distance across the land. Graphic scales show the scale as a line or a bar with the distance markings on them. Other types of map scales include numeric (such as 1:24,000 means one inch on the map represents 24,000 inches on land), or verbal (1 inch=1 mile).
a logarithmic scale
the pH scale is a scale that rates acids and bases
A thermometric scale is a type of scale that measures degrees.
Type it into a calculator
You can't really type fractions, but you can use the divide function to create the fraction line, and imitate it in a way.
complex scale meters are meters that can be used for more than one function such as Amps, Resistance, or Voltage. Whereas multiple scale meters measure only one type of function.
Word should automatically correct your fractions unless you have disabled the option: Tools-> AutoCorrect (options)-> Auto Format As You Type