Showing posts with label Mathematical Logics. Show all posts
Showing posts with label Mathematical Logics. Show all posts

Wednesday, November 23, 2011

Reverse percentage calculation?

How to find X, which give you 115000 when 15% is deducted(Reverse Percentage Calculation)?

eg ax + bx = c your eqution is
ax +b = c
where a , b and c are numerical values and x is the unknown!

For the time being we can phrase the equation as

x - 15%x = 115000

then your answer would be

x(1 - 0.15) = 115000 (factorizing x)

x (0.85) = 115000 then dividing by 0.85

x = 135294.1176

substitute for x and you will find this is a correct answer!

135294.1176 - 0.15(135294.1176) = 115000


http://uk.answers.yahoo.com/question/index?qid=20070420010452AAsnX7C