-53.95% is the change from 215 to 99
Calculation steps:
[( 99 - 215 ) ÷ 215] x 100 = -53.95%
Formula
Percentage change = [(99 - 215) / 215] x 100
Subtract the new number by the original number
99 - 215 = -116
-116 ÷ 215 = -0.5395348837209303
-0.5395348837209303 x 100 = -53.95%