SKMath.Lerp

static float Lerp(float a, float b, float t)

   
float a First item in the blend, or ‘0.0’ blend.
float b Second item in the blend, or ‘1.0’ blend.
float t A blend value between 0 and 1. Can be outside this range, it’ll just interpolate outside of the a, b range.
RETURNS: float An unclamped blend of a and b.

Blends (Linear Interpolation) between two scalars, based on a ‘blend’ value, where 0 is a, and 1 is b. Doesn’t clamp percent for you.