-79.51% is the change from 971 to 199
Calculation steps:
[( 199 - 971 ) ÷ 971] x 100 = -79.51%
Formula
Percentage change = [(199 - 971) / 971] x 100
Subtract the new number by the original number
199 - 971 = -772
-772 ÷ 971 = -0.7950566426364573
-0.7950566426364573 x 100 = -79.51%