230.71% is the change from 254 to 840
Calculation steps:
[( 840 - 254 ) ÷ 254] x 100 = 230.71%
Formula
Percentage change = [(840 - 254) / 254] x 100
Subtract the new number by the original number
840 - 254 = 586
586 ÷ 254 = 2.3070866141732282
2.3070866141732282 x 100 = 230.71%