17.58% is the change from 421 to 495
Calculation steps:
[( 495 - 421 ) ÷ 421] x 100 = 17.58%
Formula
Percentage change = [(495 - 421) / 421] x 100
Subtract the new number by the original number
495 - 421 = 74
74 ÷ 421 = 0.17577197149643706
0.17577197149643706 x 100 = 17.58%