-36.53% is the change from 271 to 172
Calculation steps:
[( 172 - 271 ) ÷ 271] x 100 = -36.53%
Formula
Percentage change = [(172 - 271) / 271] x 100
Subtract the new number by the original number
172 - 271 = -99
-99 ÷ 271 = -0.36531365313653136
-0.36531365313653136 x 100 = -36.53%