# Which greek letter is used to denote a change of any quantity in math and science?

**Question: Which greek letter is used to denote a change of any quantity in math and science?**

In mathematics and science, the Greek letter Delta (Î”) is commonly used to denote a change or difference in a quantity. Delta, the fourth letter of the Greek alphabet, appears as a triangle and is employed in various scientific fields to represent the concept of change. For instance, in calculus, Î”y/Î”x represents the change in variable y with respect to the change in variable x, which is fundamental to the concept of derivatives, indicating the rate of change. This symbol is integral to expressing mathematical differences and is a cornerstone in the language of science.

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