-32.07% is the change from 421 to 286
Calculation steps:
[( 286 - 421 ) ÷ 421] x 100 = -32.07%
Formula
Percentage change = [(286 - 421) / 421] x 100
Subtract the new number by the original number
286 - 421 = -135
-135 ÷ 421 = -0.32066508313539194
-0.32066508313539194 x 100 = -32.07%