-74.02% is the change from 839 to 218
Calculation steps:
[( 218 - 839 ) ÷ 839] x 100 = -74.02%
Formula
Percentage change = [(218 - 839) / 839] x 100
Subtract the new number by the original number
218 - 839 = -621
-621 ÷ 839 = -0.7401668653158522
-0.7401668653158522 x 100 = -74.02%