-47.87% is the change from 328 to 171
Calculation steps:
[( 171 - 328 ) ÷ 328] x 100 = -47.87%
Formula
Percentage change = [(171 - 328) / 328] x 100
Subtract the new number by the original number
171 - 328 = -157
-157 ÷ 328 = -0.47865853658536583
-0.47865853658536583 x 100 = -47.87%