-22.61% is the change from 836 to 647
Calculation steps:
[( 647 - 836 ) ÷ 836] x 100 = -22.61%
Formula
Percentage change = [(647 - 836) / 836] x 100
Subtract the new number by the original number
647 - 836 = -189
-189 ÷ 836 = -0.22607655502392343
-0.22607655502392343 x 100 = -22.61%