Answer:
[tex]\frac{2}{3}c=d[/tex]
[tex]3\cdot \frac{2}{3}c=3d[/tex]
[tex]2c=3d[/tex]
[tex]\frac{2c}{2}=\frac{3d}{2}[/tex]
[tex]c=\frac{3d}{2}[/tex]
