-90.17% is the change from 173 to 17
Calculation steps:
[( 17 - 173 ) ÷ 173] x 100 = -90.17%
Formula
Percentage change = [(17 - 173) / 173] x 100
Subtract the new number by the original number
17 - 173 = -156
-156 ÷ 173 = -0.9017341040462428
-0.9017341040462428 x 100 = -90.17%