423.97% is the change from 121 to 634
Calculation steps:
[( 634 - 121 ) ÷ 121] x 100 = 423.97%
Formula
Percentage change = [(634 - 121) / 121] x 100
Subtract the new number by the original number
634 - 121 = 513
513 ÷ 121 = 4.239669421487603
4.239669421487603 x 100 = 423.97%