Taking the ratio of two numbers x and y, also written . Here, x is called the dividend, y is called the divisor, and is called a quotient. The symbol "/" is called a solidus (sometimes, the "diagonal"), and the symbol "" is called the obelus. If left unevaluated, is called a fraction, with x known as the numerator and y known as the denominator.

Division in which the fractional (remainder) is discarded is called integer division, and is sometimes denoted using a backslash, \.

Division is the inverse operation of multiplication, so that if

then a can be recovered as

as long as . In general, division by zero is not defined since the ability to "invert" to recover a breaks down if b = 0 (in which case c is always 0, independent of a).

Cutting or separating an object into two or more parts is also called division.

 

Addition, Complex Division, Cutting, Denominator, Divide, Dividend, Division by Zero, Divisor, Integer Division, Long Division, Multiplication, Numerator, Obelus, Odds, Plane Division by Lines, Quotient, Ratio, Skeleton Division, Solidus, Space Division by Spheres, Subtraction, Synthetic Division, Trial Division, Vector Division