142.35% is the change from 340 to 824
Calculation steps:
[( 824 - 340 ) ÷ 340] x 100 = 142.35%
Formula
Percentage change = [(824 - 340) / 340] x 100
Subtract the new number by the original number
824 - 340 = 484
484 ÷ 340 = 1.423529411764706
1.423529411764706 x 100 = 142.35%