50% is the change from 24 to 36
Calculation steps:
[( 36 - 24 ) ÷ 24] x 100 = 50%
Formula
Percentage change = [(36 - 24) / 24] x 100
Subtract the new number by the original number
36 - 24 = 12
12 ÷ 24 = 0.5
0.5 x 100 = 50%
Example