-56.96% is the change from 309 to 133
Calculation steps:
[( 133 - 309 ) ÷ 309] x 100 = -56.96%
Formula
Percentage change = [(133 - 309) / 309] x 100
Subtract the new number by the original number
133 - 309 = -176
-176 ÷ 309 = -0.56957928802589
-0.56957928802589 x 100 = -56.96%