-62.5% is the change from 168 to 63
Calculation steps:
[( 63 - 168 ) ÷ 168] x 100 = -62.5%
Formula
Percentage change = [(63 - 168) / 168] x 100
Subtract the new number by the original number
63 - 168 = -105
-105 ÷ 168 = -0.625
-0.625 x 100 = -62.5%
Example