-83.63% is the change from 556 to 91
Calculation steps:
[( 91 - 556 ) ÷ 556] x 100 = -83.63%
Formula
Percentage change = [(91 - 556) / 556] x 100
Subtract the new number by the original number
91 - 556 = -465
-465 ÷ 556 = -0.8363309352517986
-0.8363309352517986 x 100 = -83.63%