-7.06% is the change from 170 to 158
Calculation steps:
[( 158 - 170 ) ÷ 170] x 100 = -7.06%
Formula
Percentage change = [(158 - 170) / 170] x 100
Subtract the new number by the original number
158 - 170 = -12
-12 ÷ 170 = -0.07058823529411765
-0.07058823529411765 x 100 = -7.06%