42.94% is the change from 340 to 486
Calculation steps:
[( 486 - 340 ) ÷ 340] x 100 = 42.94%
Formula
Percentage change = [(486 - 340) / 340] x 100
Subtract the new number by the original number
486 - 340 = 146
146 ÷ 340 = 0.4294117647058823
0.4294117647058823 x 100 = 42.94%