PR. Percent Rate of Change - JulTob/Mathematics GitHub Wiki

We use percent of change to show how much an amount has changed in relation to the original amount. Another way to think about it is:

⬆︎ When the original amount goes UP, calculate percent INCREASE.

⬇︎ When the original amount goes DOWN, calculate percent DECREASE.

 change in quantity
____________________
 original quantity

＝

 Δ𝑎       𝑎₁-𝑎₀       𝑎´
____  = ________  = ____ d𝑡
 𝑎         𝑎₀         𝑎

Express in percentage %