Hi there!
The answer is : 0.15p = p - 150
Here's why :
First store :
15% of p is the same thing as saying 15% times p and 15% is equal to 0.15, which explains the 0.15p
Second store:
p is reduced by 150, which explains the p - 150
Since the price of the both stores are equal, it explains why 0.15p is equal to p - 150
There you go! I really hope this helped, if there's anything just let me know! :)
