75% is the change from 288 to 504
Calculation steps:
[( 504 - 288 ) ÷ 288] x 100 = 75%
Formula
Percentage change = [(504 - 288) / 288] x 100
Subtract the new number by the original number
504 - 288 = 216
216 ÷ 288 = 0.75
0.75 x 100 = 75%
Example