-97.4% is the change from 578 to 15
Calculation steps:
[( 15 - 578 ) ÷ 578] x 100 = -97.4%
Formula
Percentage change = [(15 - 578) / 578] x 100
Subtract the new number by the original number
15 - 578 = -563
-563 ÷ 578 = -0.9740484429065744
-0.9740484429065744 x 100 = -97.4%