-56.87% is the change from 211 to 91
Calculation steps:
[( 91 - 211 ) ÷ 211] x 100 = -56.87%
Formula
Percentage change = [(91 - 211) / 211] x 100
Subtract the new number by the original number
91 - 211 = -120
-120 ÷ 211 = -0.5687203791469194
-0.5687203791469194 x 100 = -56.87%