84.07% is the change from 270 to 497
Calculation steps:
[( 497 - 270 ) ÷ 270] x 100 = 84.07%
Formula
Percentage change = [(497 - 270) / 270] x 100
Subtract the new number by the original number
497 - 270 = 227
227 ÷ 270 = 0.8407407407407408
0.8407407407407408 x 100 = 84.07%