-24.42% is the change from 557 to 421
Calculation steps:
[( 421 - 557 ) ÷ 557] x 100 = -24.42%
Formula
Percentage change = [(421 - 557) / 557] x 100
Subtract the new number by the original number
421 - 557 = -136
-136 ÷ 557 = -0.24416517055655296
-0.24416517055655296 x 100 = -24.42%