-63.04% is the change from 828 to 306
Calculation steps:
[( 306 - 828 ) ÷ 828] x 100 = -63.04%
Formula
Percentage change = [(306 - 828) / 828] x 100
Subtract the new number by the original number
306 - 828 = -522
-522 ÷ 828 = -0.6304347826086957
-0.6304347826086957 x 100 = -63.04%