-63.35% is the change from 835 to 306
Calculation steps:
[( 306 - 835 ) ÷ 835] x 100 = -63.35%
Formula
Percentage change = [(306 - 835) / 835] x 100
Subtract the new number by the original number
306 - 835 = -529
-529 ÷ 835 = -0.6335329341317365
-0.6335329341317365 x 100 = -63.35%