-74.97% is the change from 839 to 210
Calculation steps:
[( 210 - 839 ) ÷ 839] x 100 = -74.97%
Formula
Percentage change = [(210 - 839) / 839] x 100
Subtract the new number by the original number
210 - 839 = -629
-629 ÷ 839 = -0.7497020262216925
-0.7497020262216925 x 100 = -74.97%