83.61% is the change from 305 to 560
Calculation steps:
[( 560 - 305 ) ÷ 305] x 100 = 83.61%
Formula
Percentage change = [(560 - 305) / 305] x 100
Subtract the new number by the original number
560 - 305 = 255
255 ÷ 305 = 0.8360655737704918
0.8360655737704918 x 100 = 83.61%