68.75% is the change from 304 to 513
Calculation steps:
[( 513 - 304 ) ÷ 304] x 100 = 68.75%
Formula
Percentage change = [(513 - 304) / 304] x 100
Subtract the new number by the original number
513 - 304 = 209
209 ÷ 304 = 0.6875
0.6875 x 100 = 68.75%