67.41% is the change from 270 to 452
Calculation steps:
[( 452 - 270 ) ÷ 270] x 100 = 67.41%
Formula
Percentage change = [(452 - 270) / 270] x 100
Subtract the new number by the original number
452 - 270 = 182
182 ÷ 270 = 0.674074074074074
0.674074074074074 x 100 = 67.41%