-26.84% is the change from 421 to 308
Calculation steps:
[( 308 - 421 ) ÷ 421] x 100 = -26.84%
Formula
Percentage change = [(308 - 421) / 421] x 100
Subtract the new number by the original number
308 - 421 = -113
-113 ÷ 421 = -0.2684085510688836
-0.2684085510688836 x 100 = -26.84%