-97.56% is the change from 614 to 15
Calculation steps:
[( 15 - 614 ) ÷ 614] x 100 = -97.56%
Formula
Percentage change = [(15 - 614) / 614] x 100
Subtract the new number by the original number
15 - 614 = -599
-599 ÷ 614 = -0.9755700325732899
-0.9755700325732899 x 100 = -97.56%