-70.11% is the change from 853 to 255
Calculation steps:
[( 255 - 853 ) ÷ 853] x 100 = -70.11%
Formula
Percentage change = [(255 - 853) / 853] x 100
Subtract the new number by the original number
255 - 853 = -598
-598 ÷ 853 = -0.7010550996483002
-0.7010550996483002 x 100 = -70.11%