-52.43% is the change from 309 to 147
Calculation steps:
[( 147 - 309 ) ÷ 309] x 100 = -52.43%
Formula
Percentage change = [(147 - 309) / 309] x 100
Subtract the new number by the original number
147 - 309 = -162
-162 ÷ 309 = -0.5242718446601942
-0.5242718446601942 x 100 = -52.43%