The simplest and fastest solution is to use the Lerp node.
1) When “On Slider Value Change”, plug the value that is coming from the slider to the “alpha” of the Lerp node.
2) Then, you can freely set between the minimum and maximum value you want to limit for the actual return value from the sliders.
3) So, in “alpha” the value of the slider between 0 to 1 represents the percentage from 0% to 100%, hence returning the intended value.
4) Example: At alpha 0, you can set the minimum return value to be 50 on resolution quality. At alpha 1, you can set the maximum return value to be 80 on resolution quality.