170.74% is the change from 188 to 509
Calculation steps:
[( 509 - 188 ) ÷ 188] x 100 = 170.74%
Formula
Percentage change = [(509 - 188) / 188] x 100
Subtract the new number by the original number
509 - 188 = 321
321 ÷ 188 = 1.7074468085106382
1.7074468085106382 x 100 = 170.74%