What is 12/16 in it's lowest term

Asap (explain how you got it as well for brainliest)i tried 1: 2 and 2: 3 and they were wrong. picture of figure: in the figure below, the segment is parallel to one side of the triangle. the ratio of 12 to y is1: 21: 31: 42: 3

Which shows the pre image of triangle xyz

Which value is not a solution of 8x^3 – 1 = 0