-34.21% is the change from 836 to 550
Calculation steps:
[( 550 - 836 ) ÷ 836] x 100 = -34.21%
Formula
Percentage change = [(550 - 836) / 836] x 100
Subtract the new number by the original number
550 - 836 = -286
-286 ÷ 836 = -0.34210526315789475
-0.34210526315789475 x 100 = -34.21%