Question 109053
You say that press-n-seal costs .5 (1/2) cent per sqft, or $0.005 per sqft.

Press-n-Seal sells for 10/3 the price of Glad Wrap.

How much is Glad Wrap per sq ft?

Let GW = price of Glad Wrap, and PnS = price of Press-n-Seal.

From these few facts, we can derive an equation:
{{{PnS = (10/3)*GW}}}

We are told that {{{PnS = .5}}}
so we know that
{{{.5 = (10/3) *GW}}}
Multiply through by the reciprocal of 10/3 to isolate GW.
{{{(3/10)*.5 = (3/10)*(10/3)*GW}}}
{{{(3/10)*(1/2) = GW}}}
{{{3/20 = GW}}}
So Glad Wrap costs .15 cents per sq ft.
ALWAYS check your work!
We know that 10/3 = 3 1/3.
{{{.5 = 3.33*.15}}}
{{{.5 = .5}}}
Check!