-75.72% is the change from 173 to 42
Calculation steps:
[( 42 - 173 ) ÷ 173] x 100 = -75.72%
Formula
Percentage change = [(42 - 173) / 173] x 100
Subtract the new number by the original number
42 - 173 = -131
-131 ÷ 173 = -0.7572254335260116
-0.7572254335260116 x 100 = -75.72%