26.88% is the change from 506 to 642
Calculation steps:
[( 642 - 506 ) ÷ 506] x 100 = 26.88%
Formula
Percentage change = [(642 - 506) / 506] x 100
Subtract the new number by the original number
642 - 506 = 136
136 ÷ 506 = 0.26877470355731226
0.26877470355731226 x 100 = 26.88%