78.72% is the change from 343 to 613
Calculation steps:
[( 613 - 343 ) ÷ 343] x 100 = 78.72%
Formula
Percentage change = [(613 - 343) / 343] x 100
Subtract the new number by the original number
613 - 343 = 270
270 ÷ 343 = 0.7871720116618076
0.7871720116618076 x 100 = 78.72%