Answer:
david would saved 20%
Explanation:
The computation is shown below:
Given that
Anna saves 19%.
Laura spends 17 by 20 i.e. 85 by 100 so it saves 15%.
The ratio of david salary saved to spend be 2:8
20% : 80%
So david would saved 20%
This represent that most of the salary would spend by david
The same is relevant too