-19.41% is the change from 170 to 137
Calculation steps:
[( 137 - 170 ) ÷ 170] x 100 = -19.41%
Formula
Percentage change = [(137 - 170) / 170] x 100
Subtract the new number by the original number
137 - 170 = -33
-33 ÷ 170 = -0.19411764705882353
-0.19411764705882353 x 100 = -19.41%