142.06% is the change from 340 to 823
Calculation steps:
[( 823 - 340 ) ÷ 340] x 100 = 142.06%
Formula
Percentage change = [(823 - 340) / 340] x 100
Subtract the new number by the original number
823 - 340 = 483
483 ÷ 340 = 1.4205882352941177
1.4205882352941177 x 100 = 142.06%