254.98% is the change from 231 to 820
Calculation steps:
[( 820 - 231 ) ÷ 231] x 100 = 254.98%
Formula
Percentage change = [(820 - 231) / 231] x 100
Subtract the new number by the original number
820 - 231 = 589
589 ÷ 231 = 2.54978354978355
2.54978354978355 x 100 = 254.98%