21.28% is the change from 423 to 513
Calculation steps:
[( 513 - 423 ) ÷ 423] x 100 = 21.28%
Formula
Percentage change = [(513 - 423) / 423] x 100
Subtract the new number by the original number
513 - 423 = 90
90 ÷ 423 = 0.2127659574468085
0.2127659574468085 x 100 = 21.28%