Rowan bought some vanilla and chocolate cupcakes in the ratio of 5:4. After Rowan’s classmates ate an equal number of the two types of cupcakes, there were 40% fewer chocolate than vanilla cupcakes. In the end, there were 152 cupcakes left. How many cupcake of each type were eaten?

Mindy buys 12 cupcakes. Nine of the cupcakes have chocolate frosting and the rest have vanilla frosting. What fraction of the cupcakes have vanilla frosting 

Three bakeries had a total of 380 cupcakes at first.
Bakery A sold 1/2 of its cupcakes. Bakery B sold 2/3 of its cupcakes and Bakery C sold 4/5 of its cupcakes. They sold the same number of cupcakes. How many cupcakes did each bakery sell?

Jeff bought a box of bundt cakes containing a total of 288 pieces of chocolate bundt cakes and vanilla bundt cakes. 4/9 of the bundt cakes were chocolate and the rest were vanilla. After he ate some chocolate bundt cakes, the number of chocolates left was 5/8 of the total number of chocolates at first. How many chocolate cakes did he eat?