-97.51% is the change from 602 to 15
Calculation steps:
[( 15 - 602 ) ÷ 602] x 100 = -97.51%
Formula
Percentage change = [(15 - 602) / 602] x 100
Subtract the new number by the original number
15 - 602 = -587
-587 ÷ 602 = -0.9750830564784053
-0.9750830564784053 x 100 = -97.51%