Question

While helping her grandparents clean out their attic, Mara found her grandfather's old baseball card collection. 40% of his cards were from the 1950s. If 30 cards were from the 1950s, how many baseball cards did Mara's grandfather have in all? How many baseball cards did Mara's grandfather have in all?

Answer 1

Answer: He had 75 cards total.

Step-by-step explanation: If 40% was 30 cards 100% would be 75 cards.