-36.56% is the change from 320 to 203
Calculation steps:
[( 203 - 320 ) ÷ 320] x 100 = -36.56%
Formula
Percentage change = [(203 - 320) / 320] x 100
Subtract the new number by the original number
203 - 320 = -117
-117 ÷ 320 = -0.365625
-0.365625 x 100 = -36.56%