65.46% is the change from 304 to 503
Calculation steps:
[( 503 - 304 ) ÷ 304] x 100 = 65.46%
Formula
Percentage change = [(503 - 304) / 304] x 100
Subtract the new number by the original number
503 - 304 = 199
199 ÷ 304 = 0.6546052631578947
0.6546052631578947 x 100 = 65.46%