-63.09% is the change from 829 to 306
Calculation steps:
[( 306 - 829 ) ÷ 829] x 100 = -63.09%
Formula
Percentage change = [(306 - 829) / 829] x 100
Subtract the new number by the original number
306 - 829 = -523
-523 ÷ 829 = -0.6308805790108565
-0.6308805790108565 x 100 = -63.09%