Gio mows lawns for $25 each. He already has $250 in his bank account, but is trying to save $900. How many lawns will he need to mow to reach his goal?

Gio needs to save $900 and already has $250, so he needs to save an additional $900 - $250 = $<<900-250=650>>650.

Since Gio earns $25 per lawn, he needs to mow $650 / $25 = <<650/25=26>>26 lawns to reach his goal. Answer: \boxed{26}.

To determine the number of lawns Gio needs to mow to reach his goal, we can set up an equation.

Let's assume the number of lawns Gio needs to mow is represented by "x."

Since Gio mows lawns for $25 each, the total amount he will earn from mowing x lawns can be calculated as 25 * x.

Gio currently has $250 in his bank account, so the total amount he aims to save, including the $250, is $900.

Therefore, the equation becomes:

25x + 250 = 900

To solve for x, we can subtract 250 from both sides of the equation:

25x = 900 - 250

25x = 650

Finally, divide both sides of the equation by 25:

x = 650 / 25

x ≈ 26

Hence, Gio will need to mow approximately 26 lawns to reach his goal of saving $900.

To find out how many lawns Gio needs to mow in order to reach his goal, we need to determine the amount of money he still needs to save.

Gio's current bank account balance is $250. His goal is to save $900. Therefore, the amount he needs to save is $900 - $250 = $650.

Since Gio earns $25 for each lawn he mows, we can calculate the number of lawns he needs to mow by dividing the amount he needs to save by the amount he earns per lawn:

Number of lawns = Amount needed to save / Earnings per lawn
Number of lawns = $650 / $25

Now, let's calculate the answer:

Number of lawns = 650 / 25
Number of lawns = 26

Therefore, Gio will need to mow 26 lawns to reach his savings goal of $900.