79.63% is the change from 270 to 485
Calculation steps:
[( 485 - 270 ) ÷ 270] x 100 = 79.63%
Formula
Percentage change = [(485 - 270) / 270] x 100
Subtract the new number by the original number
485 - 270 = 215
215 ÷ 270 = 0.7962962962962963
0.7962962962962963 x 100 = 79.63%