-89.34% is the change from 929 to 99
Calculation steps:
[( 99 - 929 ) ÷ 929] x 100 = -89.34%
Formula
Percentage change = [(99 - 929) / 929] x 100
Subtract the new number by the original number
99 - 929 = -830
-830 ÷ 929 = -0.8934337997847147
-0.8934337997847147 x 100 = -89.34%