-7.38% is the change from 420 to 389
Calculation steps:
[( 389 - 420 ) ÷ 420] x 100 = -7.38%
Formula
Percentage change = [(389 - 420) / 420] x 100
Subtract the new number by the original number
389 - 420 = -31
-31 ÷ 420 = -0.07380952380952381
-0.07380952380952381 x 100 = -7.38%