Rule of three?

Hi, I'm hoping someone here can help me because this is my only hope. I'm not very good at explaining this, but I'll try. I have to calculate these problems using the rule of three, which I can actually do, but I just don't know what to do next. I'll explain my problem using the…

Interest charges?

Good evening ! Can someone tell me if this problem can be solved without equations, but rather by dividing? It involves calculating interest. You have to change it by day and then it works, and how do you do this? If so, can someone solve both problems for me without equations? I have the solutions…

Percentage calculation?

Hello, I urgently need help with the following task: Due to rationalization investments, the costs for machinery (depreciation, maintenance) increased. This represents a total cost increase of 3.8%. At the same time, personnel costs decreased by €324,000. The reduction in personnel costs resulted in a 6.4% reduction in total costs. a) calculate the old total…