Peter has 288 coins. 25% of these coins are 1 dollar coins. He wants to increase the number of 1-dollar coins to 64%. How many more 1-dollar coins must he collect?
25% of 288 is 72
(288 +x)*.64 = 72+x
184.32 + .64x = 72 + x
x= 312
+36916 
