51.49% is the change from 336 to 509
Calculation steps:
[( 509 - 336 ) ÷ 336] x 100 = 51.49%
Formula
Percentage change = [(509 - 336) / 336] x 100
Subtract the new number by the original number
509 - 336 = 173
173 ÷ 336 = 0.5148809523809523
0.5148809523809523 x 100 = 51.49%