21.75% is the change from 423 to 515
Calculation steps:
[( 515 - 423 ) ÷ 423] x 100 = 21.75%
Formula
Percentage change = [(515 - 423) / 423] x 100
Subtract the new number by the original number
515 - 423 = 92
92 ÷ 423 = 0.21749408983451538
0.21749408983451538 x 100 = 21.75%