-28.81% is the change from 590 to 420
Calculation steps:
[( 420 - 590 ) ÷ 590] x 100 = -28.81%
Formula
Percentage change = [(420 - 590) / 590] x 100
Subtract the new number by the original number
420 - 590 = -170
-170 ÷ 590 = -0.288135593220339
-0.288135593220339 x 100 = -28.81%