83.64% is the change from 275 to 505
Calculation steps:
[( 505 - 275 ) ÷ 275] x 100 = 83.64%
Formula
Percentage change = [(505 - 275) / 275] x 100
Subtract the new number by the original number
505 - 275 = 230
230 ÷ 275 = 0.8363636363636363
0.8363636363636363 x 100 = 83.64%