-66.34% is the change from 309 to 104
Calculation steps:
[( 104 - 309 ) ÷ 309] x 100 = -66.34%
Formula
Percentage change = [(104 - 309) / 309] x 100
Subtract the new number by the original number
104 - 309 = -205
-205 ÷ 309 = -0.6634304207119741
-0.6634304207119741 x 100 = -66.34%