-53.53% is the change from 906 to 421
Calculation steps:
[( 421 - 906 ) ÷ 906] x 100 = -53.53%
Formula
Percentage change = [(421 - 906) / 906] x 100
Subtract the new number by the original number
421 - 906 = -485
-485 ÷ 906 = -0.5353200883002207
-0.5353200883002207 x 100 = -53.53%