81.36% is the change from 338 to 613
Calculation steps:
[( 613 - 338 ) ÷ 338] x 100 = 81.36%
Formula
Percentage change = [(613 - 338) / 338] x 100
Subtract the new number by the original number
613 - 338 = 275
275 ÷ 338 = 0.8136094674556213
0.8136094674556213 x 100 = 81.36%