You could continued the same way.
∡KHL≅∡PHN= 38° reason cross-angles which are the same
∡MHN≅∡JHK=62° reason cross-angles
The total sum of all angles is 360°
∡JHP≅∡MHL=x reason cross-angles
2x+(2*62)+(2*38)=360 => 2x+124+76=360 => 2x+200=360 =>
2x=360-200=160 => x=160/2=80°
∡JHP≅∡MHL=80°
Good luck!!!