7/9 percent of a quantity is equal to what fraction of the quantity?

Try 7 divided by 9, that is 0.7777....

that is 77.7777777 repeating, if you were to round it it could be approximately 

77.8, 77.78 etc.

7/9 percent    is      7/9  /100   fraction of the quantity=    7/900 ths of the quantity.