152.06% is the change from 340 to 857
Calculation steps:
[( 857 - 340 ) ÷ 340] x 100 = 152.06%
Formula
Percentage change = [(857 - 340) / 340] x 100
Subtract the new number by the original number
857 - 340 = 517
517 ÷ 340 = 1.5205882352941176
1.5205882352941176 x 100 = 152.06%