-76.75% is the change from 830 to 193
Calculation steps:
[( 193 - 830 ) ÷ 830] x 100 = -76.75%
Formula
Percentage change = [(193 - 830) / 830] x 100
Subtract the new number by the original number
193 - 830 = -637
-637 ÷ 830 = -0.7674698795180723
-0.7674698795180723 x 100 = -76.75%