-63.4% is the change from 836 to 306
Calculation steps:
[( 306 - 836 ) ÷ 836] x 100 = -63.4%
Formula
Percentage change = [(306 - 836) / 836] x 100
Subtract the new number by the original number
306 - 836 = -530
-530 ÷ 836 = -0.6339712918660287
-0.6339712918660287 x 100 = -63.4%