-48.44% is the change from 320 to 165
Calculation steps:
[( 165 - 320 ) ÷ 320] x 100 = -48.44%
Formula
Percentage change = [(165 - 320) / 320] x 100
Subtract the new number by the original number
165 - 320 = -155
-155 ÷ 320 = -0.484375
-0.484375 x 100 = -48.44%