74.07% is the change from 270 to 470
Calculation steps:
[( 470 - 270 ) ÷ 270] x 100 = 74.07%
Formula
Percentage change = [(470 - 270) / 270] x 100
Subtract the new number by the original number
470 - 270 = 200
200 ÷ 270 = 0.7407407407407407
0.7407407407407407 x 100 = 74.07%