80.52% is the change from 344 to 621
Calculation steps:
[( 621 - 344 ) ÷ 344] x 100 = 80.52%
Formula
Percentage change = [(621 - 344) / 344] x 100
Subtract the new number by the original number
621 - 344 = 277
277 ÷ 344 = 0.8052325581395349
0.8052325581395349 x 100 = 80.52%