-55.12% is the change from 938 to 421
Calculation steps:
[( 421 - 938 ) ÷ 938] x 100 = -55.12%
Formula
Percentage change = [(421 - 938) / 938] x 100
Subtract the new number by the original number
421 - 938 = -517
-517 ÷ 938 = -0.5511727078891258
-0.5511727078891258 x 100 = -55.12%