gross margin, margin of profit, profit margin - the ratio gross profits divided by net sales

magnitude relation, quantitative relation - a relation between magnitudes

abundance - (chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust; expressed as a percentage or in parts per million

abundance - (physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present

albedo, reflective power - the ratio of reflected to incident light

aspect ratio - the ratio of the width to the height of a tv picture

breadth index, cephalic index, cranial index - ratio (in percent) of the maximum breadth to the maximum length of a skull

efficiency - the ratio of the output to the input of any system

facial index - the ratio (in percent) of the maximum width to the maximum height of the face

f number, focal ratio, stop number, speed - the ratio of the focal length to the diameter of a (camera) lens system

relative frequency, frequency - the ratio of the number of observations in a statistical category to the total number of observations

haematocrit, hematocrit, packed cell volume - the ratio of the volume occupied by packed red blood cells to the volume of the whole blood as measured by a hematocrit

I.Q., intelligence quotient, IQ - a measure of a person's intelligence as indicated by an intelligence test; the ratio of a person's mental age to their chronological age (multiplied by 100)

load factor - (aeronautics) the ratio of an external load to the weight of the aircraft (measured in g)

loss ratio - the ratio of the annual claims paid by an insurance company to the premiums received

Mach number - the ratio of the speed of a moving body to the speed of sound

magnification - the ratio of the size of an image to the size of the object

mechanical advantage - the ratio of the force exerted by a machine to the force applied to it

fuel consumption rate, gas mileage, gasoline mileage, mileage - the ratio of the number of miles traveled to the number of gallons of gasoline burned

betting odds, odds - the ratio by which one better's wager is greater than that of another; "he offered odds of two to one"

magnitude, order of magnitude - a number assigned to the ratio of two quantities; two quantities are of the same order of magnitude if one is less than 10 times as large as the other; the number of magnitudes that the quantities differ is specified to within a power of 10

output-to-input ratio - the output power of a transducer divided by the input power

prevalence - (epidemiology) the ratio (for a given time period) of the number of occurrences of a disease or event to the number of units at risk in the population

P/E ratio, price-to-earnings ratio - (stock market) the price of a stock divided by its earnings

productivity - (economics) the ratio of the quantity and quality of units produced to the labor per unit of time

quotient - the ratio of two quantities to be divided

index of refraction, refractive index - the ratio of the velocity of light in a vacuum to that in a medium

relative humidity - the ratio of the amount of water in the air at a give temperature to the maximum amount it could hold at that temperature; expressed as a percentage

respiratory quotient - the ratio of the volume of carbon dioxide expired to the volume of oxygen consumed by an organism or cell in a given period of time

factor of safety, safety factor - the ratio of the breaking stress of a structure to the estimated maximum stress in ordinary use

S/N, signal-to-noise, signal-to-noise ratio, signal/noise, signal/noise ratio - the ratio of signal intensity to noise intensity

stoichiometry - (chemistry) the relation between the quantities of substances that take part in a reaction or form a compound (typically a ratio of whole integers)

time constant - the ratio of the inductance of a circuit in henries to its resistance in ohms