58.19% is the change from 421 to 666
Calculation steps:
[( 666 - 421 ) ÷ 421] x 100 = 58.19%
Formula
Percentage change = [(666 - 421) / 421] x 100
Subtract the new number by the original number
666 - 421 = 245
245 ÷ 421 = 0.5819477434679335
0.5819477434679335 x 100 = 58.19%