-22.3% is the change from 834 to 648
Calculation steps:
[( 648 - 834 ) ÷ 834] x 100 = -22.3%
Formula
Percentage change = [(648 - 834) / 834] x 100
Subtract the new number by the original number
648 - 834 = -186
-186 ÷ 834 = -0.22302158273381295
-0.22302158273381295 x 100 = -22.3%