-13.53% is the change from 170 to 147
Calculation steps:
[( 147 - 170 ) ÷ 170] x 100 = -13.53%
Formula
Percentage change = [(147 - 170) / 170] x 100
Subtract the new number by the original number
147 - 170 = -23
-23 ÷ 170 = -0.13529411764705881
-0.13529411764705881 x 100 = -13.53%