34.09% is the change from 399 to 535
Calculation steps:
[( 535 - 399 ) ÷ 399] x 100 = 34.09%
Formula
Percentage change = [(535 - 399) / 399] x 100
Subtract the new number by the original number
535 - 399 = 136
136 ÷ 399 = 0.3408521303258145
0.3408521303258145 x 100 = 34.09%