-44.42% is the change from 421 to 234
Calculation steps:
[( 234 - 421 ) ÷ 421] x 100 = -44.42%
Formula
Percentage change = [(234 - 421) / 421] x 100
Subtract the new number by the original number
234 - 421 = -187
-187 ÷ 421 = -0.44418052256532065
-0.44418052256532065 x 100 = -44.42%