238.78% is the change from 245 to 830
Calculation steps:
[( 830 - 245 ) ÷ 245] x 100 = 238.78%
Formula
Percentage change = [(830 - 245) / 245] x 100
Subtract the new number by the original number
830 - 245 = 585
585 ÷ 245 = 2.3877551020408165
2.3877551020408165 x 100 = 238.78%