63.93% is the change from 305 to 500
Calculation steps:
[( 500 - 305 ) ÷ 305] x 100 = 63.93%
Formula
Percentage change = [(500 - 305) / 305] x 100
Subtract the new number by the original number
500 - 305 = 195
195 ÷ 305 = 0.639344262295082
0.639344262295082 x 100 = 63.93%