1544, German mathematician Steefel wrote in his Integral Arithmetic (for example, 8)24 or 8)24 (indicating 24 ÷ 8; In Oughtred, a)b(c stands for b÷a = c；; J. Mahon (170 1 year) is represented by D) A+B-C (A+B-C) ÷ D. In 1545, Steefel changed the capital German letter D to mean division. Later, Steven also adopted this symbol, and Gorimad (175 1) used reverse letters to indicate division, such as 124=3 and a2b2a2. In addition, in "Principles of Mathematics" published by 1790, division is represented by flat lowercase letters.

Today's division sign is called the Lahn symbol, which was quoted as a division sign in an algebra book published by Swiss J.H. Rehn in 1659. By 1668, the English version of his book became popular and has been in use ever since. In addition, in one of his papers Dissertatio de arte combinatoria, Leibniz began with the colon ":",which is becoming more and more common and still in use today.