-47.5% is the change from 320 to 168
Calculation steps:
[( 168 - 320 ) ÷ 320] x 100 = -47.5%
Formula
Percentage change = [(168 - 320) / 320] x 100
Subtract the new number by the original number
168 - 320 = -152
-152 ÷ 320 = -0.475
-0.475 x 100 = -47.5%