-41.25% is the change from 320 to 188
Calculation steps:
[( 188 - 320 ) ÷ 320] x 100 = -41.25%
Formula
Percentage change = [(188 - 320) / 320] x 100
Subtract the new number by the original number
188 - 320 = -132
-132 ÷ 320 = -0.4125
-0.4125 x 100 = -41.25%