Related Clues:

• Pi, but not rho
• 1/2, for one
• Cosine, e.g.
• 3:1 or 7:2, e.g.
• Numerical relationship
• E:G, e.g.
• Proportion
• Pi, for instance
• 10:1 or 5:2, e.g.
• Numerical proportion
• Sine or tangent, e.g.
• Mathematical proportion
• Mathematical comparison
• Many an investment stat
• 20/20, e.g.