-75.29% is the change from 344 to 85
Calculation steps:
[( 85 - 344 ) ÷ 344] x 100 = -75.29%
Formula
Percentage change = [(85 - 344) / 344] x 100
Subtract the new number by the original number
85 - 344 = -259
-259 ÷ 344 = -0.752906976744186
-0.752906976744186 x 100 = -75.29%