Answer
$\frac{1}{6}$
Work Step by Step
Thanksgiving cards to graduation cards.
As per Values given
10 million to 60 million
(10 million)/(60 million) = 10/60= (10 ÷10 )/(60 ÷10)= $\frac{1}{6}$
Ratio of Thanksgiving cards to graduation cards is $\frac{1}{6}$
