The price was marked down. If the price was reduced, we have to sum with the other value to find the original price:

The original price was $105.
The answer would be 1.40. The 3 significant figure are 1.39 and it wants us to round so we look at the 8 in 1.3981 and since 8 > 5 we know to round up.
The answer is c. the number of digital subscriptions increases by 103.4% each month.
Common ratio is 5 or -5 to be more precise. 225 divides by 45=5 and 45 divided by 9=5. So the common ratio is 5.