-50.91% is the change from 438 to 215
Calculation steps:
[( 215 - 438 ) ÷ 438] x 100 = -50.91%
Formula
Percentage change = [(215 - 438) / 438] x 100
Subtract the new number by the original number
215 - 438 = -223
-223 ÷ 438 = -0.5091324200913242
-0.5091324200913242 x 100 = -50.91%