How would i change 12.39% to a decimal?

Identify the converse of the following conditional: if a point is in the first quadrant, then its coordinates are positive. if the coordinates of a point are not positive, then the point is not in the first quadrant. if the coordinates of a point are positive, then the point is in the first quadrant. if a point is in the first quadrant, then its coordinates are positive. if a point is not in the first quadrant, then the coordinates of the point are not positive.

Tom drove 206 miles in 3.9 hours. estimate his average speed.

Which equation can be solved to find x the measure of jk in the apex