234.69% is the change from 245 to 820
Calculation steps:
[( 820 - 245 ) ÷ 245] x 100 = 234.69%
Formula
Percentage change = [(820 - 245) / 245] x 100
Subtract the new number by the original number
820 - 245 = 575
575 ÷ 245 = 2.3469387755102042
2.3469387755102042 x 100 = 234.69%