Why are cities an essential part of civilization?

the exodus of these people from constantinople contributed to the revival of greek and roman studies, which led to the development of the renaissance in humanism and science. byzantine emigrants also brought to western europe the better preserved and accumulated knowledge of their own greek civilization

the fraction 18/22 is equivalent to 9/11.

in decimal form if needed

this is a proper fraction once the absolute value of the top number or numerator (18) is smaller than the absolute value of the bottom number or denomintor (22).

the fraction 18/22 is equal to 18÷22 and can also be expressed in decimal form as 0.818182.