-7.6% is the change from 421 to 389
Calculation steps:
[( 389 - 421 ) ÷ 421] x 100 = -7.6%
Formula
Percentage change = [(389 - 421) / 421] x 100
Subtract the new number by the original number
389 - 421 = -32
-32 ÷ 421 = -0.07600950118764846
-0.07600950118764846 x 100 = -7.6%