62.3% is the change from 305 to 495
Calculation steps:
[( 495 - 305 ) ÷ 305] x 100 = 62.3%
Formula
Percentage change = [(495 - 305) / 305] x 100
Subtract the new number by the original number
495 - 305 = 190
190 ÷ 305 = 0.6229508196721312
0.6229508196721312 x 100 = 62.3%