81.82% is the change from 341 to 620
Calculation steps:
[( 620 - 341 ) ÷ 341] x 100 = 81.82%
Formula
Percentage change = [(620 - 341) / 341] x 100
Subtract the new number by the original number
620 - 341 = 279
279 ÷ 341 = 0.8181818181818182
0.8181818181818182 x 100 = 81.82%