17.34% is the change from 421 to 494
Calculation steps:
[( 494 - 421 ) ÷ 421] x 100 = 17.34%
Formula
Percentage change = [(494 - 421) / 421] x 100
Subtract the new number by the original number
494 - 421 = 73
73 ÷ 421 = 0.17339667458432304
0.17339667458432304 x 100 = 17.34%