What are the new points after 270 degrees counterclockwise

So the rule with 270° counterclockwise rotation is the same as 90° clockwise rotation: (x,y) → (y,-x)

Now applying this rule to this coordinate, (-5,1) would become (1,5).

hey! so 1 (25) out of 4 (100) is 25 so your answer is 25%. it's like quarters!