23.99% is the change from 421 to 522
Calculation steps:
[( 522 - 421 ) ÷ 421] x 100 = 23.99%
Formula
Percentage change = [(522 - 421) / 421] x 100
Subtract the new number by the original number
522 - 421 = 101
101 ÷ 421 = 0.23990498812351543
0.23990498812351543 x 100 = 23.99%