A recipe requires 2 3/5 cups of sugar for every 3 1/3 cups of flour. Which of the following unit rates appropriately represents this situation?

The gades foundation and hbm corporation are eager to donate generously to their favorite charities. the gades foundation donated $250 in the first month, and each month afterward their cumulative donation total increases by 100$ the hbm corporation donated $64, in the first month, and each month afterward their cumulative donation total increases by 75%. in which month will the hbm corporation's cumulative donation total first exceed the gades foundations' cumulative donation total?

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

I’m confused on how to work the pie charts