-92.39% is the change from 197 to 15
Calculation steps:
[( 15 - 197 ) ÷ 197] x 100 = -92.39%
Formula
Percentage change = [(15 - 197) / 197] x 100
Subtract the new number by the original number
15 - 197 = -182
-182 ÷ 197 = -0.9238578680203046
-0.9238578680203046 x 100 = -92.39%