-57.08% is the change from 212 to 91
Calculation steps:
[( 91 - 212 ) ÷ 212] x 100 = -57.08%
Formula
Percentage change = [(91 - 212) / 212] x 100
Subtract the new number by the original number
91 - 212 = -121
-121 ÷ 212 = -0.5707547169811321
-0.5707547169811321 x 100 = -57.08%