how did he found out that 90 was a 30% mark up of 300??????

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- December 19th 2012, 11:46 AMasilvester635word problem question
how did he found out that 90 was a 30% mark up of 300??????

- December 19th 2012, 01:54 PMskeeterRe: word problem question
let P = price paid for the phone

1.3P = 390

P = 300

let S = selling price

S = 0.8P = 0.8(300) = 240 - December 19th 2012, 01:59 PMasilvester635Re: word problem question
how did you get 1.3?

- December 19th 2012, 02:04 PMskeeterRe: word problem question
- December 25th 2012, 09:53 PMibduttRe: word problem question
Let the original price = $100, 30% high means marked price = $130

When marked price = $130 original price = $100

When marked price = $1 original price = $100/130

When marked price = $390 original price = $(100/130) x 390 = $300

Now he has to sell it for 20% less. 20% of 300 = 20 x 300 x 1/100 = $60

So he will get $240 for cellphone