-42.77% is the change from 173 to 99
Calculation steps:
[( 99 - 173 ) ÷ 173] x 100 = -42.77%
Formula
Percentage change = [(99 - 173) / 173] x 100
Subtract the new number by the original number
99 - 173 = -74
-74 ÷ 173 = -0.4277456647398844
-0.4277456647398844 x 100 = -42.77%