407.23% is the change from 83 to 421
Calculation steps:
[( 421 - 83 ) ÷ 83] x 100 = 407.23%
Formula
Percentage change = [(421 - 83) / 83] x 100
Subtract the new number by the original number
421 - 83 = 338
338 ÷ 83 = 4.072289156626506
4.072289156626506 x 100 = 407.23%