Because whoever drew the donkey put four stars on it. Seriously, it's just an arbitray number. If you search images of the democratic donkey, you will see there are plenty of drawings showing 1, 3, and 4 stars on the traditional mascot.
3 - 7 is the fraction for 3 shaded stars and 4 unshaded stars
Donkey Kong 3 was the last DK NES game, the next was Donkey Kong Country for the SNES in 1994
3/7 * 100 = 42.857% of the stars are shaded.4/7 * 100 = 57.143% are not shaded.
4 and a half stars.
Cavalcade of Stars - 1949 3-4 was released on: USA: 14 September 1951
2/3 of 6 is 4, so there would be 4 stars.
they gave it 4 stars or 3 and a half it said in the trailer ''amazing and 4 stars''.
3 of 4 stars
3 of 4 stars
4
4 and a half stars.