200% is the change from 8 to 24
Calculation steps:
[( 24 - 8 ) ÷ 8] x 100 = 200%
Formula
Percentage change = [(24 - 8) / 8] x 100
Subtract the new number by the original number
24 - 8 = 16
16 ÷ 8 = 2
2 x 100 = 200%
Example