-76.79% is the change from 991 to 230
Calculation steps:
[( 230 - 991 ) ÷ 991] x 100 = -76.79%
Formula
Percentage change = [(230 - 991) / 991] x 100
Subtract the new number by the original number
230 - 991 = -761
-761 ÷ 991 = -0.7679112008072654
-0.7679112008072654 x 100 = -76.79%