ra·tio 
/ˈreɪʃiˌoʊ/ noun
plural ra·tios /ˈreɪʃiˌoʊ/ noun [count] : the relationship that exists between the size, number, or amount of two things and that is often represented by two numbers
▪ The college has a 12:1 ratio between students and teachers. = The college's student-to-teacher ratio is 12 to 1. [=for every 12 students, there is one teacher] ▪ What is the length-to-width ratio? — often + of ▪ The ratio of students to teachers is 12 to 1. ▪ Women outnumbered men by a ratio of three to two. [=for every three women, there were two men] ▪ The office has a high ratio of males to females. [=there are many more males that work at the office than females] — see also aspect ratio
▪ The college has a 12:1 ratio between students and teachers. = The college's student-to-teacher ratio is 12 to 1. [=for every 12 students, there is one teacher] ▪ What is the length-to-width ratio? — often + of ▪ The ratio of students to teachers is 12 to 1. ▪ Women outnumbered men by a ratio of three to two. [=for every three women, there were two men] ▪ The office has a high ratio of males to females. [=there are many more males that work at the office than females] — see also aspect ratio
