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 !!!!!

Question

anonymous · Answer

@mathstudent55 can you help me ?

jdoe0001 · Answer

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

anonymous · Answer

It was changed by 20 cents @jdoe0001

anonymous · Answer

@ccswims can you help me ?

jdoe0001 · Answer

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 $\large {
\begin{array}{ccllll}
\$&\%
\\hline\
179&100\
20&x
\end{array}\implies \cfrac{179}{20}=\cfrac{100}{x}\impliedby \textit{solve for "x"}
}$

anonymous · Answer

Kk now should I cross mulitply ?

ccswims · Answer

yes, cross multiply

anonymous · Answer

Kk I'll do that now @ccswims

anonymous · Answer

I did it & I got 11.1731845

ccswims · Answer

yes, now make that into a percent

jdoe0001 · Answer

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

anonymous · Answer

Kk thank you very much @jdoe0001 I really appreciate it