-23.14% is the change from 834 to 641
Calculation steps:
[( 641 - 834 ) ÷ 834] x 100 = -23.14%
Formula
Percentage change = [(641 - 834) / 834] x 100
Subtract the new number by the original number
641 - 834 = -193
-193 ÷ 834 = -0.2314148681055156
-0.2314148681055156 x 100 = -23.14%