80.76% is the change from 343 to 620
Calculation steps:
[( 620 - 343 ) ÷ 343] x 100 = 80.76%
Formula
Percentage change = [(620 - 343) / 343] x 100
Subtract the new number by the original number
620 - 343 = 277
277 ÷ 343 = 0.8075801749271136
0.8075801749271136 x 100 = 80.76%