-36.88% is the change from 320 to 202
Calculation steps:
[( 202 - 320 ) ÷ 320] x 100 = -36.88%
Formula
Percentage change = [(202 - 320) / 320] x 100
Subtract the new number by the original number
202 - 320 = -118
-118 ÷ 320 = -0.36875
-0.36875 x 100 = -36.88%