The Great Wall is more than 20,000 kilometers long about 3/4 of it is considered properly preserved

97. The great wall is more than 20 000 kilometers long. And about ¾ of it is considered as properly preserved. I guess you are asking about the value of ¾ which is properly preserved in the said length of the great wall. = > ¾ = 0.75 Thus, the formula would be like this: = > 20 000 *.75 = 15 000 Thus, the ¾ value of great wall that is preserved is equals to 15 000 kilometers long,