-55.93% is the change from 388 to 171
Calculation steps:
[( 171 - 388 ) ÷ 388] x 100 = -55.93%
Formula
Percentage change = [(171 - 388) / 388] x 100
Subtract the new number by the original number
171 - 388 = -217
-217 ÷ 388 = -0.5592783505154639
-0.5592783505154639 x 100 = -55.93%