You will receive multiple questions about this graph during the test. The information below is identical for all of them.

A material is tested in tension and found to have the following stress-strain graph. The coordinates of point B on the graph are (0.25, 56). The elastic modulus of the material is 7.8 GPa.

Calculate the strain at the point where the material yields. Calculate your answer as a % to at least 3 significant figures

(Note: Do not try to just read it straight off the graph - this will not be accurate enough)