Two months ago, the price of a cell phone was `c` dollars. Last month, the price of the phone increased by `10\%`. Write an expression for the price of the phone last month.

I don’t know what number but I can help.

Say the phone was $271 and it went up ten percent

Try taking 200 and it’s 10% more. If you don’t know you take the first two digits and add a decimal in front of the last zero. You have 20 dollars. If you do that with the $271 do this $27.10 because if you take the first two digits and add a decimal before the one you have $27.1