41.85% is the change from 399 to 566
Calculation steps:
[( 566 - 399 ) ÷ 399] x 100 = 41.85%
Formula
Percentage change = [(566 - 399) / 399] x 100
Subtract the new number by the original number
566 - 399 = 167
167 ÷ 399 = 0.41854636591478694
0.41854636591478694 x 100 = 41.85%