-50.16% is the change from 614 to 306
Calculation steps:
[( 306 - 614 ) ÷ 614] x 100 = -50.16%
Formula
Percentage change = [(306 - 614) / 614] x 100
Subtract the new number by the original number
306 - 614 = -308
-308 ÷ 614 = -0.501628664495114
-0.501628664495114 x 100 = -50.16%