A store is having a 20% off sale. The sale price of an item with price p is p – 0.2p. What is an equivalent expression?

To find the equivalent expression for the sale price of an item after a 20% discount, we start with the given expression:

\[ p - 0.2p \]

We can factor out \( p \):

\[ p(1 - 0.2) \]

Now, simplifying the expression inside the parentheses:

\[ 1 - 0.2 = 0.8 \]

Thus, the expression becomes:

\[ p(0.8) \]

So, the equivalent expression for the sale price is:

0.8p