50.91% is the change from 275 to 415
Calculation steps:
[( 415 - 275 ) ÷ 275] x 100 = 50.91%
Formula
Percentage change = [(415 - 275) / 275] x 100
Subtract the new number by the original number
415 - 275 = 140
140 ÷ 275 = 0.509090909090909
0.509090909090909 x 100 = 50.91%