69.41% is the change from 304 to 515
Calculation steps:
[( 515 - 304 ) ÷ 304] x 100 = 69.41%
Formula
Percentage change = [(515 - 304) / 304] x 100
Subtract the new number by the original number
515 - 304 = 211
211 ÷ 304 = 0.694078947368421
0.694078947368421 x 100 = 69.41%