-21.57% is the change from 839 to 658
Calculation steps:
[( 658 - 839 ) ÷ 839] x 100 = -21.57%
Formula
Percentage change = [(658 - 839) / 839] x 100
Subtract the new number by the original number
658 - 839 = -181
-181 ÷ 839 = -0.21573301549463647
-0.21573301549463647 x 100 = -21.57%