78.18% is the change from 275 to 490
Calculation steps:
[( 490 - 275 ) ÷ 275] x 100 = 78.18%
Formula
Percentage change = [(490 - 275) / 275] x 100
Subtract the new number by the original number
490 - 275 = 215
215 ÷ 275 = 0.7818181818181819
0.7818181818181819 x 100 = 78.18%