SOLUTION: IF 10% of something is A why is 5% of something plus 5% again not the same figure?

Question 880826: IF 10% of something is A why is 5% of something plus 5% again not the same figure?
Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
Let A be 100, for the sake of easiness.
10% of 100 is 10
5% of 100 is 5. 5% "again" is 5% of 95, or 4.75. Total 9.75
.
You've probably seen this in department stores. "Extra 50% off already reduced merchandise." Wow, a beautiful dress for $100 marked down to $50. Shouldn't this be free? No, it is 50% off the already discounted price of $50, or 75% off, not 100%. Still a good deal :-).
RELATED QUESTIONS
Is "seven times less" than something the same as "1/7th" of something? -- From a... (answered by sofiyac)

I have a question in which is non-related to all of your categories. Why would any... (answered by josgarithmetic)

My homework problem says "Write the sentence as an absolute value inequality, then solve... (answered by josgarithmetic,MathTherapy)

5^log 8 with a base of 5. I know there is something I am forgetting about mulitplying... (answered by Big Poop,josmiceli)

A chemist has a 40 gallon solution of alcohol and water that is 5% alchol. if 10 gallons... (answered by Alan3354,mananth)

I am very unsure when it comes to functions. Can you please help me to understand what... (answered by stanbon)

My problem is C squared equals 8x squared(substituted for A) plus 15x squared(once again... (answered by oscargut)

I need help finding the first three(3) terms of the expansion (a-b)^10. I have... (answered by scott8148)

How do i find the area of any shape? like 5 sided, or something. is it just like times... (answered by Hermione ツ)