47.65% is the change from 340 to 502
Calculation steps:
[( 502 - 340 ) ÷ 340] x 100 = 47.65%
Formula
Percentage change = [(502 - 340) / 340] x 100
Subtract the new number by the original number
502 - 340 = 162
162 ÷ 340 = 0.4764705882352941
0.4764705882352941 x 100 = 47.65%