79.19% is the change from 346 to 620
Calculation steps:
[( 620 - 346 ) ÷ 346] x 100 = 79.19%
Formula
Percentage change = [(620 - 346) / 346] x 100
Subtract the new number by the original number
620 - 346 = 274
274 ÷ 346 = 0.791907514450867
0.791907514450867 x 100 = 79.19%