-26.13% is the change from 421 to 311
Calculation steps:
[( 311 - 421 ) ÷ 421] x 100 = -26.13%
Formula
Percentage change = [(311 - 421) / 421] x 100
Subtract the new number by the original number
311 - 421 = -110
-110 ÷ 421 = -0.26128266033254155
-0.26128266033254155 x 100 = -26.13%