Lizzy had $30. She loaned out $15 to her friend. How much will Lizzy have if her friend returned the money with an interest of 20%?
Let's think step by step below.
33
Initially, Lizzy had $30; she loaned out $15 so she has $30 - $15 = $15 left.

Her friend is returning the $15 with 20% interest for a total of $15 + ($15 * (20 / 100)) = $18.

Lizzy will now have $15 + $18 = $33.

.

Therefore, the answer is 33