20.59% is the change from 340 to 410
Calculation steps:
[( 410 - 340 ) ÷ 340] x 100 = 20.59%
Formula
Percentage change = [(410 - 340) / 340] x 100
Subtract the new number by the original number
410 - 340 = 70
70 ÷ 340 = 0.20588235294117646
0.20588235294117646 x 100 = 20.59%