-48.17% is the change from 191 to 99
Calculation steps:
[( 99 - 191 ) ÷ 191] x 100 = -48.17%
Formula
Percentage change = [(99 - 191) / 191] x 100
Subtract the new number by the original number
99 - 191 = -92
-92 ÷ 191 = -0.4816753926701571
-0.4816753926701571 x 100 = -48.17%