castor collects only baseball and football cards. He has 40 baseball cards and 10 football cards. Which decimal best show the part of his entire card collection represented by his baseball cards

Answer: His baseball cards can be represented as 0.8 of the entire collection

Step-by-step explanation: Castor has 40 baseball cards and 10 football cards. Therefore his total number of cards is given as 40 + 10 which is 50.

The fraction of his cards which are baseball cards only is calculated as

Baseball cards = 40/50

Baseball cards = 4/5

Converting 4/5 to a decimal (which can equally be done with a calculator) gives you 0.8

Hence, the part of his entire card collection that can be represented by baseball cards is 0.8