-17.81% is the change from 421 to 346
Calculation steps:
[( 346 - 421 ) ÷ 421] x 100 = -17.81%
Formula
Percentage change = [(346 - 421) / 421] x 100
Subtract the new number by the original number
346 - 421 = -75
-75 ÷ 421 = -0.17814726840855108
-0.17814726840855108 x 100 = -17.81%