-66.02% is the change from 309 to 105
Calculation steps:
[( 105 - 309 ) ÷ 309] x 100 = -66.02%
Formula
Percentage change = [(105 - 309) / 309] x 100
Subtract the new number by the original number
105 - 309 = -204
-204 ÷ 309 = -0.6601941747572816
-0.6601941747572816 x 100 = -66.02%