-16.96% is the change from 171 to 142
Calculation steps:
[( 142 - 171 ) ÷ 171] x 100 = -16.96%
Formula
Percentage change = [(142 - 171) / 171] x 100
Subtract the new number by the original number
142 - 171 = -29
-29 ÷ 171 = -0.1695906432748538
-0.1695906432748538 x 100 = -16.96%