anonymous one year ago An online service increased the price of downloading a song from $1.79 to$1.99 . To the nearest whole percent, by how much did the price rise ? PLZ HELP ME !!!!!

1. anonymous

@mathstudent55 can you help me ?

2. anonymous

hmmm how much did it increase by though? notice, 1.79 and 1.99 how much was changed in the price?

3. anonymous

It was changed by 20 cents @jdoe0001

4. anonymous

@ccswims can you help me ?

5. anonymous

right so, start price is 1.79 so we could say that 1.79 is the 100% amount so how much is 20cents of \$1.79 or 179cents? well $$\large { \begin{array}{ccllll} \&\% \\\hline\\ 179&100\\ 20&x \end{array}\implies \cfrac{179}{20}=\cfrac{100}{x}\impliedby \textit{solve for "x"} }$$

6. anonymous

Kk now should I cross mulitply ?

7. anonymous

yes, cross multiply

8. anonymous

Kk I'll do that now @ccswims

9. anonymous

I did it & I got 11.1731845

10. anonymous

yes, now make that into a percent

11. anonymous

yeap, and that rounded up to the nearest whole percent is, 11%

12. anonymous

Kk thank you very much @jdoe0001 I really appreciate it