-59.38% is the change from 421 to 171
Calculation steps:
[( 171 - 421 ) ÷ 421] x 100 = -59.38%
Formula
Percentage change = [(171 - 421) / 421] x 100
Subtract the new number by the original number
171 - 421 = -250
-250 ÷ 421 = -0.5938242280285035
-0.5938242280285035 x 100 = -59.38%