-11.11% is the change from 171 to 152
Calculation steps:
[( 152 - 171 ) ÷ 171] x 100 = -11.11%
Formula
Percentage change = [(152 - 171) / 171] x 100
Subtract the new number by the original number
152 - 171 = -19
-19 ÷ 171 = -0.1111111111111111
-0.1111111111111111 x 100 = -11.11%