67.33% is the change from 303 to 507
Calculation steps:
[( 507 - 303 ) ÷ 303] x 100 = 67.33%
Formula
Percentage change = [(507 - 303) / 303] x 100
Subtract the new number by the original number
507 - 303 = 204
204 ÷ 303 = 0.6732673267326733
0.6732673267326733 x 100 = 67.33%