-69.93% is the change from 848 to 255
Calculation steps:
[( 255 - 848 ) ÷ 848] x 100 = -69.93%
Formula
Percentage change = [(255 - 848) / 848] x 100
Subtract the new number by the original number
255 - 848 = -593
-593 ÷ 848 = -0.6992924528301887
-0.6992924528301887 x 100 = -69.93%