270.04% is the change from 227 to 840
Calculation steps:
[( 840 - 227 ) ÷ 227] x 100 = 270.04%
Formula
Percentage change = [(840 - 227) / 227] x 100
Subtract the new number by the original number
840 - 227 = 613
613 ÷ 227 = 2.700440528634361
2.700440528634361 x 100 = 270.04%