Percentage and math question.

Question

I have a bill that costs 839.21, i pay 322.70, my friend pays 316.40, and her friend pays 200.11, what is the percentages that each of us pay for that bill? Also a generous person has decided to pay 392 off that monthly for us, so what portion do i pay now, my friend pay and her friend pay based on what we were previously paying? How do you put that into a formula? 

Answer 1

Hi Bubble,

 

You figure the percentage by dividing the amount paid by the bill and multiplying by 100. 

 

For example, (322.70/839.21)(100)

 

For the next part of the question, you subtract the amount that the generous person pays from the bill

 

839.21 - 392

 

Then convert the percentages that you calculated in part 1 to decimals by moving the decimal points two places to the left (same as dividing the percentages by 100) and multiply them times the new monthly bill that you found by subtracting 392 from the old bill.  This will give you the new amounts that each person will pay.

 

Have fun.

 

Dan