-61.76% is the change from 170 to 65
Calculation steps:
[( 65 - 170 ) ÷ 170] x 100 = -61.76%
Formula
Percentage change = [(65 - 170) / 170] x 100
Subtract the new number by the original number
65 - 170 = -105
-105 ÷ 170 = -0.6176470588235294
-0.6176470588235294 x 100 = -61.76%