-90.59% is the change from 170 to 16
Calculation steps:
[( 16 - 170 ) ÷ 170] x 100 = -90.59%
Formula
Percentage change = [(16 - 170) / 170] x 100
Subtract the new number by the original number
16 - 170 = -154
-154 ÷ 170 = -0.9058823529411765
-0.9058823529411765 x 100 = -90.59%