0.639 is / as a fraction
Word “fraction” is derived from the Latin word fractus. It simply means how many parts of a whole we have. A fraction consists of a numerator, a slash and denominator. For example in the fraction 3/4, 3 is the numerator and 4 is the denominator.
(Do you see how it turns the top number into a whole number?)
Note: /1000 is called a decimal fraction and / is called a common fraction !
The simplest way to read fractions is to simply read them as numerator over denominator. Example, fraction 5/8 can be read as five over eight.
Lets say in a school of students, there are boys and remaining are girls. We can then simply say the the fraction of boys in this school are / and ratio of boys to total students is 0.639