-50.24% is the change from 613 to 305
Calculation steps:
[( 305 - 613 ) ÷ 613] x 100 = -50.24%
Formula
Percentage change = [(305 - 613) / 613] x 100
Subtract the new number by the original number
305 - 613 = -308
-308 ÷ 613 = -0.5024469820554649
-0.5024469820554649 x 100 = -50.24%