50.8% is the change from 502 to 757
Calculation steps:
[( 757 - 502 ) ÷ 502] x 100 = 50.8%
Formula
Percentage change = [(757 - 502) / 502] x 100
Subtract the new number by the original number
757 - 502 = 255
255 ÷ 502 = 0.5079681274900398
0.5079681274900398 x 100 = 50.8%