-66.56% is the change from 320 to 107
Calculation steps:
[( 107 - 320 ) ÷ 320] x 100 = -66.56%
Formula
Percentage change = [(107 - 320) / 320] x 100
Subtract the new number by the original number
107 - 320 = -213
-213 ÷ 320 = -0.665625
-0.665625 x 100 = -66.56%