-17% is the change from 100 to 83
Calculation steps:
[( 83 - 100 ) ÷ 100] x 100 = -17%
Formula
Percentage change = [(83 - 100) / 100] x 100
Subtract the new number by the original number
83 - 100 = -17
-17 ÷ 100 = -0.17
-0.17 x 100 = -17%
Example