25.42% is the change from 421 to 528
Calculation steps:
[( 528 - 421 ) ÷ 421] x 100 = 25.42%
Formula
Percentage change = [(528 - 421) / 421] x 100
Subtract the new number by the original number
528 - 421 = 107
107 ÷ 421 = 0.25415676959619954
0.25415676959619954 x 100 = 25.42%