-24.43% is the change from 839 to 634
Calculation steps:
[( 634 - 839 ) ÷ 839] x 100 = -24.43%
Formula
Percentage change = [(634 - 839) / 839] x 100
Subtract the new number by the original number
634 - 839 = -205
-205 ÷ 839 = -0.24433849821215733
-0.24433849821215733 x 100 = -24.43%