-17.71% is the change from 830 to 683
Calculation steps:
[( 683 - 830 ) ÷ 830] x 100 = -17.71%
Formula
Percentage change = [(683 - 830) / 830] x 100
Subtract the new number by the original number
683 - 830 = -147
-147 ÷ 830 = -0.17710843373493976
-0.17710843373493976 x 100 = -17.71%