Ratio

albedo sex ratio percent leverage dynamic range modulus difference quotient contrast voter turnout energy returned on energy invested sphericity water–cement ratio distribution of wealth digit ratio aspect ratio void ratio body proportions Sharpe ratio terms of trade Mach number Horowitz index total expense ratio stable isotope ratio lethality molar quantity Price/performance ratio air–fuel ratio PEG ratio packing density sky view factor odds ratio standing wave ratio Reference rate bit rate cephalic index Haller index factor of safety sampling fraction Slenderness ratio elasticity gear ratio relative humidity waist-to-height ratio marginal rate of substitution damping ratio average propensity to save Student–teacher ratio figure of merit Bodenstein number hazard ratio