-15.56% is the change from 983 to 830
Calculation steps:
[( 830 - 983 ) ÷ 983] x 100 = -15.56%
Formula
Percentage change = [(830 - 983) / 983] x 100
Subtract the new number by the original number
830 - 983 = -153
-153 ÷ 983 = -0.15564598168870802
-0.15564598168870802 x 100 = -15.56%