-23.13% is the change from 320 to 246
Calculation steps:
[( 246 - 320 ) ÷ 320] x 100 = -23.13%
Formula
Percentage change = [(246 - 320) / 320] x 100
Subtract the new number by the original number
246 - 320 = -74
-74 ÷ 320 = -0.23125
-0.23125 x 100 = -23.13%