5. There are two methods to increase the concentration of saltwater, one is to evaporate the water, and the other is to add salt. Now, 200 grams of 10% saltwater is divided into two portions. To one portion, 5 grams of salt is added; from the other portion, 5 grams of water is evaporated. As a result, the concentration of the two portions of saltwater is still equal. In the two portions of saltwater initially divided, the smaller portion originally had $\qquad$ grams.
$25$