-78.67% is the change from 830 to 177
Calculation steps:
[( 177 - 830 ) ÷ 830] x 100 = -78.67%
Formula
Percentage change = [(177 - 830) / 830] x 100
Subtract the new number by the original number
177 - 830 = -653
-653 ÷ 830 = -0.7867469879518072
-0.7867469879518072 x 100 = -78.67%