-65.63% is the change from 320 to 110
Calculation steps:
[( 110 - 320 ) ÷ 320] x 100 = -65.63%
Formula
Percentage change = [(110 - 320) / 320] x 100
Subtract the new number by the original number
110 - 320 = -210
-210 ÷ 320 = -0.65625
-0.65625 x 100 = -65.63%