Answer:
1.6 ounces
Step-by-step explanation:
Divide the ratio by 5 to get the number of ounces of dark chocolate used for 1 ounce of white chocolate, since 5/5 = 1
8/5 = 1.6
5/5 = 1
The new ratio is 1.6 : 1
This means that 1.6 ounces of dark chocolate are used for every 1 ounce of white chocolate