61.59% is the change from 315 to 509
Calculation steps:
[( 509 - 315 ) ÷ 315] x 100 = 61.59%
Formula
Percentage change = [(509 - 315) / 315] x 100
Subtract the new number by the original number
509 - 315 = 194
194 ÷ 315 = 0.6158730158730159
0.6158730158730159 x 100 = 61.59%