-74.37% is the change from 839 to 215
Calculation steps:
[( 215 - 839 ) ÷ 839] x 100 = -74.37%
Formula
Percentage change = [(215 - 839) / 839] x 100
Subtract the new number by the original number
215 - 839 = -624
-624 ÷ 839 = -0.7437425506555423
-0.7437425506555423 x 100 = -74.37%