SOLUTION: What would be the formula for figuring out a percentage that as already been added to a total and you want to isolate the percentage already added? Example: $100 is the Total bi

Algebra.Com
Question 814958: What would be the formula for figuring out a percentage that as already been added to a total and you want to isolate the percentage already added?
Example: $100 is the Total bill, taxes are included already (13%)
What was the original number (100) before taxes were added (13%)?
Thank You
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi,

 C + .13C = Total

 C(1+ .13)= Total

   C =  If tax = 7.5%, for ex:  C = 

   C = = $88.50  (rounded to the nearest penny) 

RELATED QUESTIONS


I would like to know the formula please for figuring out what % a number is of a total... (answered by Earlsdon)

I need help figuring out how to solve this problem. If you could provide a formula and... (answered by stanbon)

A boy has to pay his parents back $100. Every two weeks, he saves $25. Write and solve an  (answered by macston)

What is the percentage error if I use a value of 3/1/7 for pie?

I know that this... (answered by RAY100)

*NEED HELP WITH THIS LAST ASSIGNMENT FOR ALGEBRA 2. I'M HAVING TROUBLE FIGURING IT OUT.... (answered by ewatrrr,Tipporules)

I would like to figure out how to mix pesticide at various concentrations for my garden.... (answered by jorel1380)

If you have numbers from 1 to 999 in a bag and you pull out 10 numbers, what are the odds  (answered by edjones,CharlesG2)

Lenders such as banks, credit unions, and mortgage companies make loans. The person... (answered by Theo)

I had a test of 46 questions: one question equaled 4 points, a second question had 5... (answered by lynnlo)