Upgrade Chance ( New )

For normal upgrade card :

+1 100%
+2 90%

+3 80%
+4 65%
+5 45%
+6 30%
+7 20%
+8 15%
+9 7%
+10 2%

For high quality upgrade card :

+1 100%
+2 95%
+3 85%
+4 70%
+5 50%
+6 34%
+7 23%
+8 17%
+9 8%
+10 3%