20.57% is the change from 423 to 510
Calculation steps:
[( 510 - 423 ) ÷ 423] x 100 = 20.57%
Formula
Percentage change = [(510 - 423) / 423] x 100
Subtract the new number by the original number
510 - 423 = 87
87 ÷ 423 = 0.20567375886524822
0.20567375886524822 x 100 = 20.57%