-68.33% is the change from 540 to 171
Calculation steps:
[( 171 - 540 ) ÷ 540] x 100 = -68.33%
Formula
Percentage change = [(171 - 540) / 540] x 100
Subtract the new number by the original number
171 - 540 = -369
-369 ÷ 540 = -0.6833333333333333
-0.6833333333333333 x 100 = -68.33%