84.14% is the change from 309 to 569
Calculation steps:
[( 569 - 309 ) ÷ 309] x 100 = 84.14%
Formula
Percentage change = [(569 - 309) / 309] x 100
Subtract the new number by the original number
569 - 309 = 260
260 ÷ 309 = 0.8414239482200647
0.8414239482200647 x 100 = 84.14%