Travis works at a kite factory. he checks all the kites before they are packaged. travis discovered that of the 28 kites that he inspected 7 kites did not pass 4 kites did not have tails and 3 kites had the wrong colors

From the information you have given us. From my best guess, you are looking for how many kites passed inspection? if so. 28- 10= 18 - 4 = 14.       so 14 kites have passed inspection and the other 14 have not. so 50% passed the other 50% did not. 

He will need 2,898 pieces of paper

Idon't know what's the answer lol