Answer: There are 287 coupon books that Miley make for the fundraiser.
Step-by-step explanation: 
Let the total number of coupon books she made for the fundraiser be 'x'. 
On first day, the number of coupon would be 
 
On second day, the number of coupon was 
 
Since we have given that 
Number of coupon books on second day = 48 
According to question, it becomes,

Hence, there are 287 coupon books that Miley make for the fundraiser.