In 2022, protected terrestrial conservation areas covered 14.8 percent of the world's land surface, at 2220 million hectares. Between 2002 and 2022, 420 million hectares of previously protected land was degazetted (removed from protected status).
Calculate the percentage of the world's land surface covered by protected terrestrial conservation areas in 2002 to the nearest whole number. You must show your working out.