-68.45% is the change from 542 to 171
Calculation steps:
[( 171 - 542 ) ÷ 542] x 100 = -68.45%
Formula
Percentage change = [(171 - 542) / 542] x 100
Subtract the new number by the original number
171 - 542 = -371
-371 ÷ 542 = -0.6845018450184502
-0.6845018450184502 x 100 = -68.45%