-41.04% is the change from 173 to 102
Calculation steps:
[( 102 - 173 ) ÷ 173] x 100 = -41.04%
Formula
Percentage change = [(102 - 173) / 173] x 100
Subtract the new number by the original number
102 - 173 = -71
-71 ÷ 173 = -0.41040462427745666
-0.41040462427745666 x 100 = -41.04%