199.63% is the change from 270 to 809
Calculation steps:
[( 809 - 270 ) ÷ 270] x 100 = 199.63%
Formula
Percentage change = [(809 - 270) / 270] x 100
Subtract the new number by the original number
809 - 270 = 539
539 ÷ 270 = 1.9962962962962962
1.9962962962962962 x 100 = 199.63%