-14.07% is the change from 199 to 171
Calculation steps:
[( 171 - 199 ) ÷ 199] x 100 = -14.07%
Formula
Percentage change = [(171 - 199) / 199] x 100
Subtract the new number by the original number
171 - 199 = -28
-28 ÷ 199 = -0.1407035175879397
-0.1407035175879397 x 100 = -14.07%