0.24% is the change from 421 to 422
Calculation steps:
[( 422 - 421 ) ÷ 421] x 100 = 0.24%
Formula
Percentage change = [(422 - 421) / 421] x 100
Subtract the new number by the original number
422 - 421 = 1
1 ÷ 421 = 0.0023752969121140144
0.0023752969121140144 x 100 = 0.24%