Math Help - Percentages

1. Percentages

Hi,

May I be assisted with the following please?

1.) A book was sold for $45 at a loss of 10%. What was the original price? $10 \% \times 45 = 4.5$ $\45 + 4.5 = \49.5$ $\rm{Original \ Price} = \49.5$ 2.) A man bought a chair for$350. He sold it at a profit of 25%. How much was the selling price?

$350 \times 0.25$

$= 87.5$

$\rm{Selling \ Price} = 87.5 + \350 = \437.50$

2. Re: Percentages

Edit2: This post was editted after I made a mistake.

1) I think 1 is incorrect.

The man sold the book for \$45 which was a 10% loss.

This means that he only sold the book at 90% of the original price.
Which means that $0.9x=45$ where $x$ is the original price in dollars.

2) Is fine.