-83.87% is the change from 564 to 91
Calculation steps:
[( 91 - 564 ) ÷ 564] x 100 = -83.87%
Formula
Percentage change = [(91 - 564) / 564] x 100
Subtract the new number by the original number
91 - 564 = -473
-473 ÷ 564 = -0.8386524822695035
-0.8386524822695035 x 100 = -83.87%