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September 18, 2014

Posted by **Meenakshi** on Tuesday, December 4, 2012 at 9:45am.

- maths -profit and loss -
**Reiny**, Tuesday, December 4, 2012 at 10:37amoriginal case:

let CP = x

SP = 1.2x

profit = .2x

new SP = 1.2x + 30

new CP = x+50

new profit = 1.2x + 30 - (x+50)

= .2x - 20

but this new profit is 3 1/3% less than the old one

or it is 29/30 of the old one

.2x-20 = (29/30)(.2x)

6x - 600 = 5.8x

.2x = 600

x = 3000

original CP = 3000

original SP = 3600

check:

old CP = 3000

old SP = 3600

old profit = 600

new CP = 3050

new SP = 3600 + 30 = 3630

new profit = 580

change in profit = 20

percentage change in profit = 20/600 = .0333333 = 3 1/3%

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