-12.72% is the change from 173 to 151
Calculation steps:
[( 151 - 173 ) ÷ 173] x 100 = -12.72%
Formula
Percentage change = [(151 - 173) / 173] x 100
Subtract the new number by the original number
151 - 173 = -22
-22 ÷ 173 = -0.12716763005780346
-0.12716763005780346 x 100 = -12.72%