 The numbers "A" and "B" are sometimes called "terms of the ratio" with "A" being the "antecedent" and "B" being the "consequent".A statement expressing the equality of two ratios "A"∶"B" and "C"∶"D" is called a proportion, written as "A"∶"B" = "C"∶"D" or "A"∶"B"∷"C"∶"D".This latter form, when spoken or written in the English language, is often expressed as

"A", "B", "C" and "D" are called the terms of the proportion.