80.74% is the change from 270 to 488
Calculation steps:
[( 488 - 270 ) ÷ 270] x 100 = 80.74%
Formula
Percentage change = [(488 - 270) / 270] x 100
Subtract the new number by the original number
488 - 270 = 218
218 ÷ 270 = 0.8074074074074075
0.8074074074074075 x 100 = 80.74%