-80.94% is the change from 425 to 81
Calculation steps:
[( 81 - 425 ) ÷ 425] x 100 = -80.94%
Formula
Percentage change = [(81 - 425) / 425] x 100
Subtract the new number by the original number
81 - 425 = -344
-344 ÷ 425 = -0.8094117647058824
-0.8094117647058824 x 100 = -80.94%