73.5% is the change from 351 to 609
Calculation steps:
[( 609 - 351 ) ÷ 351] x 100 = 73.5%
Formula
Percentage change = [(609 - 351) / 351] x 100
Subtract the new number by the original number
609 - 351 = 258
258 ÷ 351 = 0.7350427350427351
0.7350427350427351 x 100 = 73.5%