-50.33% is the change from 614 to 305
Calculation steps:
[( 305 - 614 ) ÷ 614] x 100 = -50.33%
Formula
Percentage change = [(305 - 614) / 614] x 100
Subtract the new number by the original number
305 - 614 = -309
-309 ÷ 614 = -0.503257328990228
-0.503257328990228 x 100 = -50.33%