262.5% is the change from 8 to 29
Calculation steps:
[( 29 - 8 ) ÷ 8] x 100 = 262.5%
Formula
Percentage change = [(29 - 8) / 8] x 100
Subtract the new number by the original number
29 - 8 = 21
21 ÷ 8 = 2.625
2.625 x 100 = 262.5%
Example