-66.25% is the change from 320 to 108
Calculation steps:
[( 108 - 320 ) ÷ 320] x 100 = -66.25%
Formula
Percentage change = [(108 - 320) / 320] x 100
Subtract the new number by the original number
108 - 320 = -212
-212 ÷ 320 = -0.6625
-0.6625 x 100 = -66.25%