-80.91% is the change from 330 to 63
Calculation steps:
[( 63 - 330 ) ÷ 330] x 100 = -80.91%
Formula
Percentage change = [(63 - 330) / 330] x 100
Subtract the new number by the original number
63 - 330 = -267
-267 ÷ 330 = -0.8090909090909091
-0.8090909090909091 x 100 = -80.91%