What form of writing is displayed in the image above and who invented this writing?

Cuneiform (Ancient Mesopotamia)

Explanation:

Cuneiform was used mainly in Mesopotamia but also in parts of Persia as well. These symbols were writen using a sharp reed by making imprints on wet clay tablets. This writing system was invented by Ancient Sumerians. Cuneiform was used from around 3500-3000 BCE.

part a. there were 250 teenagers surveyed (100% of tenagers = 250)therefore 1 % = 250/100 = 2.5 76% = 1% x 76 = 2.5 x 76 = 190 teenagers of the 250 surveyed liked burgerspart b: jane surveyed 25% (which is equal to 50 teenagers, i.e. a quarter of the teenagers surveyed is 50) to get 100% we simply get 4 quarters, i.e. multiply 50 by 4 = 200 teenagers were surveyed by jane. part c: it is impossible to give an example where a percentage is greater than 100%, since, by definition , percentage means "per 100".