89.63% is the change from 270 to 512
Calculation steps:
[( 512 - 270 ) ÷ 270] x 100 = 89.63%
Formula
Percentage change = [(512 - 270) / 270] x 100
Subtract the new number by the original number
512 - 270 = 242
242 ÷ 270 = 0.8962962962962963
0.8962962962962963 x 100 = 89.63%