Its not that hard.
Half of the inch part is 1/2 inch which is also 4/8.
half of the 3/4 part is 3/8 you get by multiplying the denominator by 2.
Put it all back together and you get the 4/8 part and the 3/8 part so in total its 7/8 of an inch.
From wiki.gis.com. Main article: Map legend. A map legend or key is a visual explanation of the symbols used on the map. It typically includes a sample of each symbol (point, line, or area), and a short description of what the symbol means. For example, a short segment of a blue sinuous line may be labeled 'rivers'.
A legend is a caption, a title or brief explanation appended to an article, illustration, cartoon, or poster. A key is an explanatory list of symbols used in a map, table, etc. Legend is more generic, while key is more specific. The Keys are the symbols and numbers within the Caption that the Legend explains.
Also Know, what are the symbols on a map? Cartographers use different symbols on maps to represent real features from the world. Three common types of symbols are point symbols, line symbols and area symbols. Cartographers use point symbols to show exactly where one thing (a school or a hospital) is located on the map. The symbol is usually a dot or a picture.
Also know, how do you make a legend on a map?
Create a map legend
What is the difference between a map scale and a map legend?
The smaller the area a map shows, the more detail it includes. The scale can be expressed as a ratio, a bar, or equivalent units of distance. The legend on the Miami Beach map shows major points of interest for tourists. A map usually includes a compass rose to show which directions are north, south, east, and west.