-4.12% is the change from 170 to 163
Calculation steps:
[( 163 - 170 ) ÷ 170] x 100 = -4.12%
Formula
Percentage change = [(163 - 170) / 170] x 100
Subtract the new number by the original number
163 - 170 = -7
-7 ÷ 170 = -0.041176470588235294
-0.041176470588235294 x 100 = -4.12%